Depending on the application, check valves can get a bad rap. They are blamed for problems such as water hammer, vibration, reverse flow, leakage, or component wear and damage—all of which are harmful to downstream systems. However, the real cause of these problems usually stems from poor sizing and inadequate selection of the check valve for the application.
Most check valves are selected on line size and the desire for the largest valve flow coefficient available. Swing checks require a minimum rate of flow for the valve to function. If the flow is not sufficient to hold the disc in a fully open and stable position, the disc and associated internal parts will be in a constant state of motion (wobble). Insufficient flow results in premature wear, noisy operation, and vibration.
The solution to this problem is selecting a line size that produces sufficient flow. A general rule of thumb for water systems is to maintain a minimum of 7.5 feet per second (ft/sec) flow rate. If the system struggles to maintain that flow rate, it is sometimes recommended that the line size be reduced.
In piping systems containing other types of fluids, the flow requirements vary with the specific gravity of the media. The following formula can be used to approximate the minimum flow rates.
Flowmin (ft/sec) = 60 √V
V = specific volume of fluid (ft3/lb)
Silent check valves such as the Milwaukee Valve 1400 (Wafer) and 1800 (Globe) have slightly different flow requirements. Spring-loaded silent check valves are designed to provide a cracking pressure of 0.5 psi and to fully open at a flow velocity of 4 ft/sec.
All check valves should be installed in a location that has smooth and laminar flow conditions. The following general rules exist for check valve installations:
Downstream of a reciprocating pump or other turbulence-inducing device (elbow, tee, etc.):
Swing type: Locate the valve a minimum of 10–12 diameters downstream of the device.
Silent type: Locate the valve a minimum of 4–5 diameters downstream of the device.
Pipe fittings, elbows, reductions, etc., downstream of the valve:
Swing type: Locate the elbow a minimum of 5–7 diameters downstream of the valve.
Silent type: Locate the elbow a minimum of 2–3 diameters downstream of the valve.
With just 25 months to construct a 12-story, two-building assisted living facility in Dallas, TX, Brandt Companies relied on the Reliance Worldwide Corporation (RWC) HoldRite products they have trusted for more than 15 years to save time while meeting code requirements. Brandt was commissioned to install firestop and plumbing systems. Project Superintendent Andrew Meshell and Project Manager Spencer Jackson chose HoldRite’s engineered firestopping solutions and pipe support products.
HoldRite’s new construction plumbing rough-in products helped Brandt reduce installation times while maintaining quality on the jobsite. HydroFlame Pro cast-in-place sleeves were the natural choice for Meshell and Jackson for UL-listed firestop sleeves. Their telescoping functionality means they can easily fit into tight areas.
When it came to in-wall rough-in plumbing, the team secured pipes with HoldRite stout and copper brackets and clamps. Not only did they offer the right pipe support for the job, but they also locked the measurement down so the team did not have to worry about the under-slab rough-in being off when they came back later to install fixtures. The brackets gave the contractors peace of mind that the pipes were secured in the wall right where they needed to be.
Ultimately, Brandt installed more than 4,000 HydroFlame Pro sleeves, as well as HoldRite clamps and various other components, to meet the job requirements and the deadline. To them, HoldRite has always been—and continues to be—an innovative partner with solutions to get the job done efficiently without sacrificing quality.
“One of the best things you get out of the HoldRite products is they take a 30-minute job down to a 5-minute job.”
— Andrew Meshell, Project Superintendent, Brandt Companies
Brandt continues to use HoldRite products because they are user-friendly and versatile, allowing the team to work quickly and use across a diverse range of applications. “One of the best things you get out of the HoldRite products is they take a 30-minute job down to a 5-minute job,” Meshell said.
To Meshell, HydroFlame Pro sleeves are easy to install and can be used in a variety of installations. When working on the Dallas assisted living facility, his team only needed to bring one type of sleeve on the site to accommodate multiple jobs.
“Because of [HoldRite’s] versatility, we’re able to meet and beat the expectations from our customers to maintain a schedule,” Jackson said. “I would say there’s no comparison. This is the right product to use.”
With technology changing at a rapid pace, adding new tools to your truck can provide a quick productivity boost. Keep in mind that a tool’s weight, size, overall portability, and versatility are critical when making purchases.
When investing in a new tool, you will want to consider:
Will it save time and space by incorporating multiple tools into one?
How much space will it take up in your truck?
Are ergonomics incorporated into the tool’s design to minimize user fatigue?
For example, the RIDGID® RP-342 XL Press Tool boasts the widest range of applications of any press tool. It presses 1/2″ to 4″ copper, stainless steel and carbon steel pipe and 1/2″ to 2″ PEX pipe—in under 12 seconds and all with one tool. It is ergonomically designed and compatible with the full line of Standard 32kN Press Tool accessories, including the StrutSlayr™ Strut Shear Head, Press Snap™ Soil Pipe Cutter and all MegaPress jaws.
New tools can benefit productivity, but they are not the only way to maximize your time. Here are a few additional ideas to reclaim potentially wasted time.
Assess and Restock Service Vehicles
Keep a standardized list of tools and products for each service vehicle. Make that list available to your team for regular reference to ensure routine items are stocked and at-the-ready. Refer to the list at the end of each day, and restock any needed items so that you are ready to go at the start of the next work day. Taking those few moments can improve productivity and minimize delays getting to a jobsite.
Prepare Your Crew for Upcoming Projects
Just as you make sure your service vehicles are stocked and ready to go, ensure your team is prepared for their day as well. Whether it is a quick meeting at the beginning of the day, a team email on who is doing what, or a group text with key project notes, sharing details of what is planned for the day can be beneficial in making sure team members know what is expected of them when they get to a jobsite.
Find Ways to Minimize Trips to the Service Vehicle
How many times have you just gotten started at a jobsite when you realize you left a key tool in your vehicle? Keeping standard tools and supplies—the ones you cannot live without—in a tool box or storage container that you bring into every job can minimize trips to your vehicle. Investing in tools that have minimal service downtime is another great way to up productivity. For example, the RIDGID RP 350 Press Tool has a brushless motor that eliminates the need for scheduled service. There is no scrambling to find a new tool while the other is out for maintenance. This idea goes beyond tools and plumbing project supplies. Consider bringing the materials you need for invoicing into a home at the beginning of a job.
You can increase productivity by choosing tools that need little or no maintenance—such as the RIDGID RP 350 Press Tool, which has a brushless motor that eliminates the need for scheduled service.
Maintain Your Tools
It sounds simple, but taking routine care of your tools can minimize downtime for tool repair. Many newer tools will alert you to upcoming service needs, allowing you to plan for maintenance, whether that means swapping in another tool or planning for projects that do not require a tool that is in the shop. For example, the RIDGID RP 240 and 241 compact press tools allow you to connect your tool through your phone using the RIDGID Link app to view cycle counts and battery life. Investing in some tools with diagnostics might make sense if unexpected maintenance or repairs are a regular pain point that delays your work. However, understanding how to properly use your tools and keeping them clean, charged and lubricated can keep them ready for the next project longer.
Whether enhanced productivity means heading home a little earlier at the end of the day or being able to take on a few more projects each year, these small changes can have a huge impact.
Havtech and MacDonald-Miller Facility Solutions (MacMiller) are among those MCAA members using XOi Technologies to capture facilities information that helps them improve service and better communicate with clients. In a highly competitive market, video documentation helps them get client approval quickly, demonstrate that work is completed, and bring technicians up to speed quickly before they go onsite to provide service.
Communicating the complexities of a service call to a customer can be extremely challenging. Video of a service call can explain a lot, but it can be difficult to email a large video file. XOi Technologies’ holistic communication tool allows a service contractor to send a PDF to a facilities manager with an easily shareable link that provides documentation in the form of photos, videos, notes, and text narration of recommended and completed work. A link to a customized, cloud-based file that shows the entire service call provides unbeatable transparency.
“Capturing photo and video content of the opportunities our technicians find in the field has become extremely valuable to our customers. It is becoming an expectation in our marketplace.”
—Rory Olson, Service Operations Manager, MacMiller
Sometimes a service call cannot be completed in a single visit. For example, repairs might require ordering specialized parts, which might threaten to exceed a customer’s service and maintenance budget. Typically, there are many moving parts when completing and recommending work, and dealing with an offsite facilities manager can be an added challenge when trying to get additional work and orders approved. Attaching links with visual confirmation of necessary parts and service can be a huge help to expedite the decision-making and approval process.
Enhanced Credibility
Havtech, one of the mid-Atlantic’s largest and most experienced providers of commercial HVAC equipment, building automation systems, field services, distribution, and energy solutions, uses XOi Technologies’ platform to document jobsite conditions before, during, and after each visit, taking the guesswork out of what is really going on with facility equipment. Doing so allows their customers to make informed decisions and feel confident in their investment.“XOi has given us a tool to increase credibility and just overwhelm people with communication,” said Erik Hess, service operations leader of Havtech. “We’ve had times where customers called in and challenged the work performed. Havtech has the ability to provide the customer with an electronic link to watch the associated video.”
Collaborative Communication
The wealth of information the XOi solution documents and provides ultimately makes the facilities manager’s job easier, strengthening the relationship between customers and service providers. MacMiller, a leader in design, retrofit, and service capabilities in the Pacific Northwest, counting Nike, Boeing, and Microsoft among its clients, implemented the communication tool after company executives identified mobility and collaboration technology as two key growth drivers to ensure continued success and differentiate the organization.
“Capturing photo and video content of the opportunities our technicians find in the field has become extremely valuable to our customers. It is becoming an expectation in our marketplace,” said Rory Olson, service operations manager of MacMiller. “XOi’s platform provides a clean way to connect our customers with the solutions we provide. It has also become a useful training tool for mentoring and developing technicians.”
Building a Data Library
Perhaps more important than the ability to show and tell are the data that the software captures. The solution creates a library of all the videos created for a customer, allowing the next service technician sent to that site to access the complete work history for the specific piece of equipment. This library of knowledge and data ultimately improves the contractor’s quality control.
“XOi has given us a tool to increase credibility.”
—Erik Hess, Service Operations Leader, Havtech
The data captured can be used to show energy consumption, based on instrument readings taken by technicians. The data can also be used to track the integrity of a unit over time, identifying whether the unit’s performance is degrading. Such information can be paired with additional software to track the amount of money a client has spent on each piece of equipment, the number of service calls required, the type of repairs needed, and whether the equipment requires callbacks. The combined information can be used to make the case for buying and installing a new piece of equipment rather than continuing to repair an old one.
XOi Technologies also enables users to construct a database of service videos, service manuals, wiring diagrams, and all kinds of the other information that a technician needs when he’s in front of the equipment. No wonder that XOi Technologies CEO and cofounder Aaron Salow calls the cloud-based video platform “the future of service.”
Upgrading from Excel to LaborChart for labor scheduling proved to be an ideal solution for Martin Mechanical Inc., streamlining communication and making life easier for the whole staff. With LaborChart, “all the information is in one place and it’s easier to navigate. This helps everybody in our company,” said Seth Rogers, project manager and manpower supervisor for the Kansas City, MO, contractor.
Workforce Worries
The day typically starts for Martin Mechanical Inc.’s field crews at 7 a.m., but Rogers’ phone would often ring 15 minutes before the clock had officially started. He would spend his morning answering a flurry of emails and phone calls to make sure each of the ongoing projects was staffed properly. “Scheduling manpower sounds easy, but it isn’t,” Rogers said of the hours he would spend on his phone shifting personnel and coordinating teams in the field.
Martin Mechanical’s labor force has a wide skill set with expertise in plumbing and pipefitting. The company employs 40 people in the field, split between divisions that work on new projects and technicians responding to service calls.
Like many small companies, Martin Mechanical relies on an administrative staff for labor scheduling. The challenge was that the administrative team did not always have field or industry experience, and they did not have an efficient way to find out details about the skills and equipment for the available pool of employees. Martin Mechanical needed a central place where schedulers could easily access the information relevant to assigning people in the field.
Better Scheduling
Martin Mechanical had been tracking projects in Excel, which made it difficult to communicate information about projects and people. LaborChart provided a cloud-based alternative that could be easily accessed by decision-makers. The digital platform provided key insights and a better window into labor scheduling.
“LaborChart makes so much sense. It makes my life easier. I’m not trying to chase anybody down with emails and phone calls.”
—Seth Rogers, Project Manager and Manpower Supervisor, Martin Mechanical Inc.
“Excel isn’t efficient for scheduling labor,” Rogers said. “LaborChart made scheduling easy and functional.”
By giving managers in the field and dispatchers in the office access to the dashboard, the entire team was able to work from the same information in real time. As a small staff without a dedicated labor person, Martin Mechanical was able to spread the duties across multiple people. Without making Rogers or another member of senior management the focus, the project dashboard empowered team members to work collectively on labor scheduling.
When Rogers gets project requests, he instantly has the answer for what he needs rather than having to hunt for information in Excel. What once took six phone calls or three emails is now available at the click of a button.
“LaborChart makes so much sense. It makes my life easier. I’m not trying to chase anybody down with emails and phone calls,” Rogers said. Rogers also relies on LaborChart for estimating projects. He can pull up historical data, track the current spend on a project, and understand the true cost of adding labor to the bottom line. “If you’ve got to move people at the start of a job, then you’re in a hole before from the start. With LaborChart, we’ve got the right labor mix at the start of a project,” Rogers noted.
Warner Mechanical of Northwest Ohio is saving time and labor resources in many ways since they invested in a Trimble X7 3D laser scanner powered by Trimble FieldLink software. What previously took two to three days onsite using a tape measure and paper is now easily done in one day. The combination of Trimble hardware and software also extends BIM workflows and helps Warner Mechanical precisely capture accurate as-built conditions to facilitate prefabrication, layout, safety, real-time viewing, communication, and collaboration. Trimble is a sponsor of MCAA’s 2021 Virtual Education Conference.
Moving Away From Manual
At a Lima, OH, project site, Warner Mechanical used the Trimble X7 Scanner to get precise readings for installing underground sanitary piping, which helps ensure precise prefabrication and layout.
Historically, when Warner Mechanical was working on a prefabrication project, the team would go out to the field with a tape measure and measure the area, take as many notes as possible, and bring the information back to the office. Often, they would then think of other measurements they needed or wanted and would either go back and do more measuring or hope that the prefabrication would work with the existing measurements. If they were not working on a prefabrication project, they would do all of the measuring and fitting in the field.
Doug Riddell, BIM/CAD coordinator at Warner Mechanical, had been doing 3D modeling for two years and was pushing the envelope from a technology perspective. One of the hurdles he faced during prefabrication was that although the 3D model was a great tool, accuracy could vary by about two inches—which is two inches too much when it comes to tight tolerances for prefabricated piping that need to hit a precise point on a coil or boiler connection. Further, the variance can increase by another two inches based on the type of building or where the equipment is installed in the building. So, when all variances are factored in, prefabrication measurements could be up to four inches off on prefabrication.
Warner Mechanical wanted to implement a system that would improve the company’s prefabrication process and get its team up to speed on the latest technology. “The biggest reason we were interested in investing in a scanner was that we wanted to be able to scan the mechanical room on a new construction site once the equipment is installed and set,” said Kevin Phillips, senior project manager of Warner Mechanical. “The goal is to bring that information back into the model to see where the deviations are so we can dial in the accuracy before we prefabricate from the 3D model.” In addition, the company was looking for a way to increase efficiency and save time.
In Bellevue, OH, Warner Mechanical used the Trimble X7 scanner to prepare for underground piping installation. The monitor shows the essential points, and Warner Mechanical can visualize the scan data, model, and field layout points on a tablet controller without leaving the project site.Ben Little, field technology salesman for Building Point Ohio Valley, surveys a recently completed project using the Trimble X7 3D Scanner, so Warner Mechanical can compare initial job drawings with the as-built drawings for the project, making prefabrication and other processes more accurate.
Optimizing Prefabrication
Working with Building Point Ohio Valley, a Trimble reseller, Warner Mechanical purchased a Trimble X7 3D laser scanner powered by Trimble FieldLink software because of its advanced features and lower price point. By preparing their Revit model with Trimble SysQue and then exporting the data to Trimble FieldLink, Warner Mechanical can use one software application to capture and register scan data, align it with the 3D model of the project, and visualize the scan data, model, and field layout points on a tablet controller without leaving the project site. This workflow enables the team to be efficient with their time while on the job and avoid additional processing time back in the office.
One of Riddell’s favorite features of the X7 scanner is the Trimble Registration Assist for in-field registration that allows for automatic scan orientation and alignment with the last preselected scan. He also likes the ability to customize the scanner to allow for faster scans and the ability to view both scans and 3D models on the tablet controller for onsite viewing.
Once the mechanical equipment is installed in a building or facility, Warner Mechanical can go to a site and use the scanner to capture an area and easily compare the scan data measurements with the 3D model on a tablet controller to see whether there are any deviations between the scan and the model.
“The Trimble X7 scanner allows us to control our working atmosphere for prefabrication while also removing the added variables of a busy construction work area. The scanner also gives us exact information, which greatly diminishes the labor burden,” said Riddell. “It is efficient, user-friendly, and informative.”
Speed, Accuracy, and Labor Savings
Warner Mechanical describes its experience with the scanner as invaluable because of the amount of information gained, which has helped alleviate issues even as they were just getting started with the technology. “The X7 scanner has touched several different areas of our business and improved our operations considerably in just the short time we have had it,” said Riddell.
On a recent project involving the mechanical room for a local elementary school, the Warner Mechanical team used the scanner to visualize the room and see it from different angles to pinpoint the exact systems. After installing the new systems, they were able to go back in and scan everything so they had both the original 3D model and the final installation scan file to overlay. They discovered an issue with the doors of an air handler hitting pipe when opened, and the clearance was accounted for in the modeling. They wanted to find out whether the manufacturer’s model was accurate and also whether their field workers put the pipe in the proper place. Using FieldLink allowed them to see exactly where the equipment was set in the model and compare it with what was actually installed in the field.
The speed and accuracy of the scanner is helping Warner Mechanical save time and labor resources. Further, they are increasing safety for their team by using the scanner to facilitate preconstruction efforts. Because the most dangerous spot on the construction site is the actual field, doing preconstruction in a controlled environment with pinpoint accuracy from the scans eliminates some risk.
Another unexpected benefit was that general contractors now know Warner Mechanical has a 3D scanner, which allows the company to play a major role in creating 3D models for other contractors. This capacity gives them an edge in doing the mechanical portion of projects and enables them to generate additional revenue streams.
The X7 scanner has helped further Warner Mechanical’s mission to embrace technology and facilitate collaboration between the office and the field. “We utilize scans for accurate prefabrication and layout and can also use the real-time viewing feature to quickly show scans to project managers,” said Riddell. “The future looks to be incredibly exciting as we learn more about the scanner, and we are excited to apply this technology on many more jobs to come.”
This issue of Smart Solutions highlights new technology, products, and services to help meet continuing labor and other challenges in the industry. For example, by using FARO Technologies Inc.’s new laser scanners, one Limbach worker can capture in a few hours what used to take a team of people to complete in a week. Limbach also adopted MSUITE’s FabPro software in a pop-up fabrication shop, minimizing assembly and installation time and completing the project two months early.
Atomatic Mechanical Services Inc. credits XOi Technologies with helping them manage their workload with existing personnel rather than hiring more people. With Procore software, Monterey Mechanical Co. increased efficiency, saving one day a week of work per employee. Because Boston Children’s Hospital used Marking Services Inc.’s products to keep track of documents for thousands of facility assets, they were able to access needed warranty information easily, saving money.
Investing in time-saving products paid off for CRW Mechanical, which won a project bid by switching to a Milwaukee® Long Throw Press Tool that slashed labor costs. Piping Systems Inc. bought a Watts-Mueller cutting system to reduce cutting times and gain a competitive advantage. Bayer’s Plumbing used MIFAB’s modern grease interceptor solution to keep costs and installation time down for a restaurant renovation. Installing Marley® Cooling Towers from SPX Cooling Technologies, Inc., Wayne Crouse, Inc. shaved several days off of the schedule for a challenging hospital project.
For a demanding new warehouse project, Current Mechanical counted on Victaulic’s experienced virtual design and construction team, fabrication services, and grooved mechanical couplings to save installation time when its workforce was stretched thin. Olson Plumbing and Heating leveraged Viega ProPress to take on a mountain of a project: building a new visitor’s complex at the summit of Colorado’s Pikes Peak.
Members are meeting customers’ demands with energy-efficient products. For example, Daikin Applied helped a medical center update its aging HVAC infrastructure and secure a $160,000 energy-efficiency rebate from the local utility provider. Following an energy audit, McKinstry specified Uponor’s flexible Ecoflex preinsulated piping to resolve a remote Minnesota school’s longtime heating problems and save the school thousands in energy costs. A community college installed new Lochinvar boilers to meet its ambitious energy-reduction goals.
This issue also features technical insights from Sloan on upgrading water systems, from IMI Hydronic Engineering on climate control, and from Wieland Chase on the effectiveness of dezincification-resistant brass. We hope you will take advantage of our manufacturer/supplier partners’ knowledge and expertise to help you improve productivity and increase profits.
When it came time for Luminis Health Doctors Community Medical Center (LHDCMC) of Lanham, MD, to update its aging HVAC infrastructure, it quickly awarded the business to the Daikin Applied team in Washington, DC, which has helped the hospital meet its patient care and comfort needs for years. The project leads helped LHDCMC secure a $160,000 energy efficiency rebate from the local utility provider, and the updates will save the facility over $70,000 per year in energy costs. The work had to be completed in the midst of a shutdown necessitated by the COVID-19 pandemic.
Founded in 1975 by a team of physicians committed to improving local access to care, the center provides medical and surgical services to residents in Anne Arundel and Prince George’s counties in Maryland (suburbs of Washington, DC) and across the state’s Eastern Shore. It joined the Luminis Health system in 2019 to form LHDCMC and is a nationally recognized nonprofit hospital that has grown into an ultramodern operation with more than 200 beds.
To minimize the effects of the HVAC overhaul on patient care and staff productivity, the project was divided into phases. Phase one was slated to take place during the winter months to help moderate the demand on the equipment for chilled water. Phase two was scheduled for summer to help reduce the demand on the hospital’s boiler for steam and hot water. “I have never worked with a group that is so efficient and can get things done with minimal disruption,” said Jerry Dyer, LHDCMC’s director of Plant Operations.
Installing Daikin’s Magnitude magnetic-bearing WMC and Pathfinder AWV chillers earned Luminis Health Doctors Community Medical Center a $160,000 energy efficiency rebate and is projected to save the facility over $70,000 per year in energy costs.
The turnkey package included new air- and water-cooled chillers, hot water and steam boilers, cooling towers, chilled and condenser water systems, hot water pumps, and chiller and boiler plant controls. The Daikin team partnered with an MEP engineer to ensure an efficient and code-compliant design. In addition, the team employed seasoned partners in the mechanical, electrical, and controls trades to ensure a high-quality outcome.
The solution included Daikin’s Magnitude® magnetic-bearing WMC and Pathfinder® AWV chillers to form a hybrid that uses a combination of air-cooling technology in the winter months and water-cooled technology in the summer months to meet hospital loads. Magnetic-bearing technology eliminates oil, mechanical seals, wear surfaces, and gears, resulting in longer machine life and increased reliability.
Using direct drive technology, integral variable-frequency drives, and ozone-friendly R134a refrigerant, the Magnitude chiller can be up to 40 percent more efficient than standard centrifugal chillers. The variable drive responds according to cooling demand rather than operating at a constant rate. The award-winning Pathfinder is one of the most efficient air-cooled screw chillers on the market. It features proprietary, variable-volume ratio®, single-rotor compressor technology and fully-variable-speed ECM condenser fan motors. Further, the chillers operate quietly and reliably—ideal for the health care environment.
To further optimize energy consumption, the Daikin team specified a state-of-the-art controls platform, leveraging the latest techniques for running the chillers and accessory equipment at the lowest energy consumption rate possible. The controls also provide facility operators with real-time energy data in terms of kilowatts per ton of performance.
In the midst of the carefully-timed schedule—but just after the chillers and cooling towers were set in place—Maryland initiated a COVID-19 shutdown, except for essential services. Daikin Applied and its dedicated partners worked to finish the project with a renewed sense of urgency and care. The upgraded HVAC system, with magnetic-bearing chillers and controls optimization, will cut LHDCMC’s energy use to 23 percent of the current chiller plant consumption.
By installing Procore software, Monterey Mechanical Co. was finally able to offer mobile information access to everyone on its team. The efficiencies gained work out to a savings of one day a week of work per employee. Monterey Mechanical credits Procore with helping them complete projects early, as in the case of a Brentwood, CA, water treatment plant, and under budget, as with a San Francisco wastewater treatment facility.
Monterey Mechanical had a software solution to manage projects, but it did not offer mobile functionality in the field. “Only the project manager or project engineer had access to the information. The field people didn’t have access,” recalled Division Manager Ed Moore. Moore also noted that the system often crashed. Plus, employees stored documents on their own devices which made collaboration difficult. Moore further explained, “Project managers used their own forms and systems. It was really disjointed. Everybody had their own stuff and it wasn’t shared.”
A construction manager that Monterey Mechanical worked with recommended Procore, and they implemented it soon after. Procore offered a centralized platform that was accessible to all collaborators—from anywhere. All the project information is now consolidated into one platform. “Procore gave our field team access to information,” said Moore. “Everything that used to be in a file cabinet is now accessible with a couple of clicks.”
Procore helped Monterey Mechanical keep the San Francisco Public Utility Commission’s Southeast Treatment Plant project on schedule and $2.25 million under the city’s revised budget—after tasks were added to the original scope of work.
Not only did field teams have access to important project information, so too did executives, accounting teams, and other project stakeholders—all in one place. They could easily view, update, and share information, regardless of their location. “The president of our company can get access to information, and so can a foreman out in the field. They can both see submittals, RFIs [requests for information], and document photos,” said Moore.
More importantly, the system was easy for teams to adopt. “The field teams aren’t really used to technology, so we were worried they might struggle with it—but that wasn’t the case at all. When we made it available to them, they latched onto it and ran with it,” Moore noted. That ease of use helps Monterey Mechanical attract and retain top talent.
“We’re a 77-year-old company, but we like to think we’re on the leading edge of what’s going on. When people hear that we’re using Procore and we’re doing different things with construction technology, they get excited about possibly coming to work for us,” said Moore. “Procore offers their platform to schools, so students are using it now too. It’s great for when we’re recruiting and they hear we use it,” he added.
Moore said that with a centralized system, Monterey Mechanical is able to maintain consistent processes. “It’s exciting to see how our new talented employees are developing and how Procore helps us with that. With Procore, it’s easy to show them what our standard procedures are.”
In doing so, Monterey Mechanical not only ensures its success now but also sets itself up to continue its longstanding legacy into the future. “I enjoy seeing these new talented people stepping into important roles in our company,” said Moore. “I can see us being able to turn the reins over to them, hopefully, in the future.”
Prefabrication was just one of the ways that Olson Plumbing and Heating leveraged Viega ProPress to take on a mountain of a project: building a new visitor’s complex at the summit of Pikes Peak that met strict environmental standards … during the COVID-19 pandemic.
“We prefabbed all the domestic and hydronic piping, as much as we could, to minimize labor at the top,” said Josh Crippen, superintendent at Olson. “We prefabbed our pump skids, all the water heater and boiler skids, all the waste and vent piping. As much as possible.”
Building the new Pikes Peak (Colorado) Summit Complex, situated at 14,110 feet in elevation, put Olson crew members at the highest ongoing construction site in North America. The challenge of simply breathing at 14,000 feet in elevation, where the air is exceptionally thin, is tough enough. But add in the manual work done on a construction site, plus weather and COVID-19 precautions, and the jobsite becomes exceptionally challenging. Workers had to pass full physicals; they were equipped withpersonal oxygen cans and watched each other closely.
“Any given day, you can almost guarantee that somebody on one of the crews—whether ours or someone else’s up there—would get altitude sickness,” said Dom Wilson, field foreman for Olson. “We worked in the buddy system so you could recognize if your partner was not feeling well. What you think is a slight headache is really an attack of the altitude, and you need to get down to 11,000 feet and be evaluated by an EMT.”
The Summit Complex will replace the Summit House, built more than 60 years ago, and at 38,000 square feet, the new build involved a lot. For contractors who had the ability, prefabrication of anything possible at a lower elevation was all but a necessity.
Pressing Matters
The folks at Olson will tell you they use Viega ProPress as often as possible, but using it on a job like the one for “America’s Mountain” was extra important. Viega’s press technology requires no soldering, welding, or threading. Connect your pipes with a press fitting, use a battery-operated press tool and jaws to complete the press in seconds, and move onto the next joint. It is fast, clean and simple.
Prefabricating with Viega ProPress meant that the Olson crew spent less time working at altitude to complete the Pikes Peak Summit Complex, where the air was thin and the weather potentially dangerous.
For the Olson crew, the ability to prefab so many of the pieces at their shop in Colorado Springs meant there was less work to do at altitude. Sections of pipe were trucked up the mountain on special trailers purchased by the general contractor, GE Johnson Construction Company. Crippen said the trailers had movable axles to get through the switchbacks on the steep road to the top.
But before Olson could even think about putting together sections of pipe using ProPress, they first had to pass special specifications. The Summit Complex was constructed to meet the Living Building Challenge (LBC), one of the most rigorous proven performance standards for buildings. Olson and the other subcontractors had to undergo a strenuous submittal process to ensure their products were accepted by the LBC. Viega certifies many of its products, including ProPress, to the stringent LBC requirements.
Extreme Construction Conditions
Work on the new Summit Complex began in 2018 when existing central utility plants were demolished and a temporary utility plant for blackwater was installed to keep the old Summit House operational during construction of the new building, about 100’ away.
Viega certifies many of its products, including ProPress, to the stringent LBC requirements, so Olson was confident that the products they used for the Pikes Peak Summit Complex would meet the LBC standards.
“Midsummer was a big race to get all of the in-floor heat in and get the foundation done and the building footprint excavated,” said Crippen. “We were really close—three weeks before the weather shut us down.”
Regular Colorado weather, which can fluctuate from 30º F to 70º F in a day, pales in comparison to the weather at the top of a fourteener (what Coloradans call the state’s 58 peaks that are 14,000’ or higher) like Pikes Peak. While the temperature in Colorado Springs near the base of the mountain might be 30º F and sunny, the summit temperature is likely to be −20º F with howling winds and nothing to stop them.
With potentially treacherous weather conditions, crews working at the summit had to be on their toes all the time. Crippen described spring and summer lightning storms as “unbelievable” and noted that when lightning appeared within 20 miles, everyone had to shelter in place to stay safe.
The added curveball of COVID-19 safety restrictions complicated the project further. The logistics of getting everyone up the mountain safely, with vehicle capacities and mask requirements, was tough. Olson’s crews began plumbing and piping in the summer of 2020. With a short window to get everything to the peak and in place, the clock was always ticking in the background.
Viega Solutions
For the wastewater treatment facility at the summit, Viega ProPress Stainless connects the settling tanks and reclaimed water system. Blackwater is captured and treated through a chlorine ultraviolet light filter process. After about a year, the graywater can be reused to flush the toilets in the Summit Complex.
“This is not like your average gravity system for drainage!” said Crippen. “It’s a vacuum system like in an airplane or cruise ship. It’s part of the LBC and the green building, to be able to reuse materials. This build will be the first of its kind.”
Settling tanks at the peak separate the waste solids, which are pumped out to a truck (through copper with ProPress fittings) and taken down the mountain. The rest goes into other settling tanks where the treatment process begins.
Inside the Summit Complex are 37 water closets and 18 hand sinks. All of the bathroom facilities are serviced through copper with ProPress fittings. The entire building is heated from two electric boilers with 12 zones of in-floor heat, and the heating water is also supplied via ProPress. The building has three sump pits to handle what Mother Nature provides, and that runoff water is pumped out through copper and ProPress as well.
Each year, more than half a million people visit the summit of Pikes Peak. The new three-story Summit Complex will feature a large walkway as well as multimedia exhibits to tell the story and history of the mountain. These indoor and outdoor exhibits will also educate visitors about the climate and geography, recreational opportunities, and conservation initiatives—like those of the LBC.
AIM Mobile Technology and Field Implementation Services from Marking Services Inc. (MSI)allow Boston Children’s Hospital (BCH) to keep track of documents for thousands of facility assets—which not only helps them comply with rigorous requirements for health care institutions but also saved money by ensuring easy access to warranty information for a failing piece of equipment. The move from paper to digital helps the hospital provide care that aligns with best practices.
The BCH maintenance and engineering teams recognized that their paper tracking system was not efficient. It was also difficult to use during audits by The Joint Commission, which subjects hospitals to regular reviews to maintain their accreditation. With limited resources to ensure that critical documents were available on demand and that all assets were identified and inventoried on an ongoing basis, BCH turned to MSI.
MSI partnered with BCH to implement AIM Mobile Technology and Field Implementation Services to label all facility assets accurately with a scannable QR-coded tag. Once tagged, assets can be scanned with a mobile device, providing users with critical asset documents instantly on location in the field. This service is proving invaluable to BCH, as they can pull up maintenance records, manuals, warranty information, drawings, work orders, inspection reports, and more simply by scanning the equipment tag. Not only does this service improve operational efficiency, it also adds confidence that the system is compliant in the event of an audit.
BCH is especially satisfied with how AIM Services helps them serve their patients. BCH Director of Engineering Paul Williams said, “The most important element of our operations is the regulatory requirements BCH must follow, which focus on industry best practices and safe operations for our patients, which directly impact our patients’ care. MSI’s AIM Mobile Technology and Field Services provided the necessary tools for our operation’s team to consistently maintain and operate equipment in the most efficient and effective manner.”
For the project, MSI did a complete field survey to locate, identify, and tag all assets. The AIM Services team then mined data from the proper documents and uploaded the documents to the cloud-based information management application, which can be accessed 24/7 from a mobile device or desktop computer.
AIM Services provides BCH with confidence that all its asset documents are stored correctly, both during construction and after commissioning in daily operations. Everyone, from facility managers to contractors, now has a secure portal to access information that will save time and money and ensure that BCH is operating at peak efficiency to provide the best care possible for patients.
Cogeneration System Meets Ambitious Sustainability Goals
Lochinvar boilers installed more than 25 years ago on Finger Lakes Community College’s (FLCC’s) main campus delivered state-of-the-art high efficiency in their day, but the college needed to upgrade to meet its ambitious energy-reduction goals. EMCOR Services-Betlem recommended Lochinvar’s XRGI®25 combined heat and power system, integrated with a new KNIGHT® boiler system, to provide hot water and space heating across nearly 500,000 square feet of campus buildings—resulting in a cogeneration system that creates energy as it works.
FLCC has served upstate New York for more than 50 years. Annual enrollment is about 6,000, and most students attend classes at the 250-acre main campus in Canandaigua, NY. FLCC Forward, the school’s strategic plan through 2023, emphasizes FLCC’s commitment to “pursue innovations and partnerships that show the greatest promise for building a culture of sustainability and continuous improvement that mirror our values of inquiry, perseverance, and interconnectedness.”
EMCOR Services-Betlem helped Finger Lakes Community College move its ambitious sustainability plans forward by specifying a Lochinvar cogeneration system for hot water and heating, earning the college a $17,000 design/build incentive from the state utility and projected electricity savings of more than $11,000 per year.
Catherine Ahern, FLCC’s director of facilities and grounds, met with Bill Coe, director of project development for EMCOR Services-Betlem and Lochinvar sales representative WMS Sales to begin a New York State Energy Research and Development Authority study to identify capital projects to improve the college’s energy efficiency. When the study was completed, Ahern and Coe began exploring options for replacing the domestic hot water system.
After a visit to Lochinvar, Ahern and Coe decided to integrate the company’s Micro CHP XRGI25 cogeneration system into the capital project to increase savings further by connecting the school’s domestic hot water system to its space-heating hot water loop. Adding the cogeneration system allows FLCC to generate electricity onsite. FLCC received a $17,000 design/build incentive from New York State Energy & Gas, the first incentive ever given for a cogeneration project in the utility’s history.
The college removed its two old boilers and replaced them with two Lochinvar KNIGHT 399,000 BTU/hr high-efficiency boilers and two hot-water storage tanks. The Micro CHP system was then piped in, prioritizing domestic hot water while also supplying space heating for nearly 500,000 square feet of campus buildings. The Micro CHP system uses natural gas to simultaneously create heat for hot water and electricity that can be used on the campus. This capability is particularly important in regions of the country where there is a wide “spark spread”—the difference between the low cost of natural gas and the high cost of local electricity. By relying on the high-efficiency KNIGHT boilers during periods of peak demand, the system provides all the hot water required at the school. Simultaneously, it generates electricity to reduce grid dependence and lower electrical costs by using the same fuel used to produce hot water.
“The Micro CHP cogeneration project demonstrates FLCC’s commitment to the sustainability and energy-saving goals that are central to our FLCC Forward strategy,” said Ahern. “Adding the Micro CHP system along with the KNIGHT boilers will help FLCC achieve significant savings long term by improving the efficiency of both space heating and domestic hot water delivery while simultaneously generating electricity on campus,” said Coe. EMCOR Services-Betlem estimated that the school will reduce its annual electric bill by $11,074 per year by generating electricity onsite with the Micro CHP system. Cogeneration projects typically have a return on investment payback time of four years—sometimes significantly sooner if the business is located in an area with a high spark spread.
The cogeneration system is the first commercial product released in Lochinvar’s partnership with EC POWER, Europe’s leading producer of combined heat and power plants. The partnership aims to meet the fast-growing need for cogeneration products that can reduce the environmental impact and electricity costs for commercial businesses across North America.
School Solves Persistent Heat-Loss Problems, Cuts Energy Costs by Using Ecoflex Preinsulated PEX Piping
Following an energy audit, McKinstry specified Uponor’s flexible Ecoflex preinsulated piping to resolve a remote Minnesota school’s longtime heating problems and save the school thousands in energy costs. Ecoflex proved easy to install, allowing workers to lay hundreds of feet of piping in just one week.
Heating System Headaches
Wolf Ridge Environmental Learning Center in Finland, MN, is a nationally accredited K–12 school and residential educational center for outdoor learning adventures. The campus, which spans more than 2,000 acres of forests, inland lakes, and streams, is located in one of the northernmost areas of the nation—where winter temperatures can fall well below zero for months at a time and snowfall accumulations can total more than 100” for the season.
The first buildings constructed on the site included two classroom buildings, an administration building, a dining hall, and a dormitory, totaling 61,000 square feet. All the buildings, with the exception of the Science Center, were heated via four 3,200-gallon cordwood boilers in a remote district heating plant located approximately 500’ north of the dining hall. Each boiler featured a simple aquastat controller to circulate the energy through the underground loops.
An underground fiberglass piping network distributed hot water to heat the buildings through air-handling coils. The fiberglass pipes were insulated with ½” urethane foam and covered with polyethylene black plastic wrap. The Science Center building was heated via an in-slab hydronic radiant floor heating system that received local electric off-peak energy for the heating supply source. The Science Center could not be part of the underground distribution loop because the ground was complete bedrock and would have required additional soil to bury the district heating piping.
The entire district heating system seemed to work well upon initial installation. However, over the first winter, the heat loss to ground was so significant that it melted the snow pack above the distribution lines. So, Wolf Ridge placed 2” polystyrene foam above sections of the piping system that were experiencing the greatest heat loss. Although this initially helped, within a few days into the heating season, the heat-loss problem was again obvious—as demonstrated by a melted path in the ground.
McKinstry specified Uponor’s Ecoflex preinsulated PEX piping to resolve persistent heat retention problems at Wolf Ridge Environmental Learning Center in Finland, MN, where winter temperatures can fall well below zero for months and seasonal snowfall accumulations can total more than 100”.
A few years later, Wolf Ridge added a second dormitory. This time, instead of using fiberglass for the underground distribution loop, the center decided to try another product it hoped would offer better insulation. The product, Uponor’s Ecoflex, featured PEX service pipe surrounded by PEX foam insulation and covered by a corrugated HDPE jacket.
The product allowed increased flexibility because the different layers could “move” independently from one another. It also allowed easier accessibility to the service pipe because the PEX foam insulation was not adhered to the service pipe. The project used 1,223’ of 2½” Ecoflex to supply district energy for heating and domestic hot water to the 23,000-square-foot east dormitory.
Systemwide Solution Needed
Fast-forward 12 years. The Wolf Ridge district energy system needed an upgrade. “We knew we had a problem with heat loss and aging boilers,” said Pete Smerud, executive director of Wolf Ridge. “However, we needed documented data to prove the inefficiency of the fiberglass system as well as the viability of the district energy system.”
Bernie Eikmeier, program manager of McKinstry, was asked to perform an energy audit of the system. For three weeks, Eikmeier tested the heat loss of the fiberglass and flexible preinsulated systems to gather data. His results showed the flexible preinsulated pipe experienced an average of 15-percent heat loss while the fiberglass pipe experienced an average of 60-percent heat loss. McKinstry estimated that by repiping with Ecoflex, Wolf Ridge could reduce its energy consumption by 20 percent annually, saving approximately $6,400 in annual fuel supply costs.
District Energy vs. Distributed Heat
After deciding on the product to use for the underground distribution piping, Wolf Ridge also needed to consider which application would be best. The center considered several options provided by McKinstry during the energy audit. Based on McKinstry’s recommendation, management decided to upgrade the existing boilers and replace the distribution system.
Uponor’s Ecoflex preinsulated piping, proposed by McKinstry, comes in long coil lengths up to 600’, so workers did not need to stop often to make connections during installation.
Gulbranson Excavating of Eveleth, MN, dug the trenches for the new pipe, and Shannon’s Plumbing of International Falls, MN, along with members of Wolf Ridge staff and engineers from Uponor, installed the Ecoflex system. The project included 340’ of 2” supply and return pipes in a single jacket and 610’ of 3” single pipe in a jacket.
The Ecoflex pipes came in long coil lengths up to 600’, which meant the installers did not need to stop often to make connections. They used a large uncoiler to lay the pipe in the trench efficiently in just one week.
McKinstry recommended mounding the backfilled material over the pipe to distribute surface water runoff, which was especially important as springtime water percolating through the soil created some of the most challenging conditions with the fiberglass pipe.
When it came time to install the second phase of the repipe for the west dorm and education building, the consistency of the Ecoflex system allowed a fast, efficient installation that met the same one-week construction schedule. The west dorm repipe used 180’ of 2” supply and return pipes in a single jacket and 1,170’ of 4” single pipe in a jacket.
The whole installation went very smoothly, and the installers were able to finish the project within the tight timeframe. Because Wolf Ridge is a 24/7 operation, the installation speed was crucial to the success of the project.
The first winter after the installation, Wolf Ridge saved approximately $7,000 in fuel supply costs—just on the wood alone. The consumption of wood dropped 21.5 percent from a yearly average of 200 cords to 157 cords—and that was during an extreme winter. Reducing consumption by 43 cords per year offered Wolf Ridge an annual savings of approximately 190 birch trees (140,000 lb.) and 860 million British thermal units (MBtu). The energy cost savings were even greater when adding in reduced labor costs of feeding and removing the ashes from the wood-fired boilers.
An Education in Energy Efficiency
Following the repipe, Wolf Ridge replaced the cordwood boilers with two new biomass wood pellet boilers to bring even greater energy efficiency to its campus. The new system is a pressurized, closed-loop system operating at 22 psi. The old cordwood boilers were only operating at 50 percent of their maximum efficiency because of corrosion buildup on the heat exchanger. The new boilers increased capacity by 58 percent from 1.9 MBtu to 3.0 MBtu while reducing the volume of water needed to store the energy by 75 percent (without including the distribution system volume).
McKinstry recommended mounding the backfilled material over the new Ecoflex pipe to distribute surface water runoff and mitigate a problem that hampered the previously installed fiberglass pipe. The first winter after the installation, Wolf Ridge saved approximately $7,000 in fuel supply costs thanks to the changes suggested by McKinstry.
Before Wolf Ridge replaced the distribution piping, the district heating system supply temperatures were around 105° F because of heat loss to the ground. With the new wood pellet boilers and distribution system in place, the system supply temperature is set at 160° F.
In addition to its new district energy system, which now includes domestic hot water, Wolf Ridge has added a solar thermal domestic hot-water system, working in concert with the biomass in the east dorm. The center also benefits from a 1.2-kW solar photovoltaic system and a 10-kW wind turbine that together supply 20 percent of the Science Center’s electrical needs.
As an educational facility, Wolf Ridge uses these new energy-efficient resources to teach its students about the importance of district energy, renewable energy sources, and sustainability. It also demonstrates how solar and biomass energy sources can help increase energy efficiency.
“Everyone at Wolf Ridge is so passionate about the sciences and teaching others about the importance of energy efficiency and natural resources,” said Smerud. “I’m very proud of the work we do here, and I’m glad that our new energy systems will allow us to continue providing education in an energy-efficient environment for decades to come.”
For more information,visit www.uponor-usa.com. MCAA thanks Uponor for being an MCAA sponsor.
Atomatic Mechanical Services Inc. credits XOi with helping them manage their workload. “Before using XOi, we were on the brink of having to hire more inside support to handle quotes,” said Jordan Goldenstein, general manager of Atomatic’s residential group. “Now, with this smoother process, we are able to handle the work with our existing personnel.”
Atomatic was founded in 1945 to install, service, and design HVAC systems for the residential new construction marketplace. The company has grown and continues to serve commercial, institutional, industrial, and residential buildings and homes throughout the Greater Chicago area.
The XOi Vision app has set Atomatic apart from its competition by allowing their techs to provide thorough information to both clients and team members through the use of photos and videos. By implementing XOi, Atomatic has seamlessly enhanced job summaries and information with more detail, reduced workflow errors, and streamlined internal processes. The app enables them to give visual information that justifies all of their recommended and completed work.
“We can now utilize existing completed workflows as marketing pieces for potential clients,” said Goldenstein. “Not many contractors in our area are using technology like this, so it has added great value for us. The streamlined process for our quoting is allowing us to be more efficient internally and provide a better product to our clients.”
By Mark Lawinger, Senior Product Line Manager for Flushometers and Fixtures, Sloan
You have probably heard about “the five Ps:” Proper planning prevents poor performance. This concept is particularly important when embarking on a commercial retrofit project to reduce water consumption.
With no water following the liquid waste, drain lines are subject to the buildup of struvite.
Whether it is to gain LEED points, meet regulatory requirements, save on utility costs, or contribute to a larger green initiative, there are multiple benefits to upgrading outdated plumbing fittings and fixtures. Thanks to advancements in commercial plumbing technology today’s commercial restrooms use only a fraction of the water compared with systems from decades past.
It can be tempting to simply specify new high-efficiency equipment, calculate the gallons saved per fixture, count the fixtures, and multiply to get the expected water savings. In a perfect world, that is all that would be needed to get started. But a lack of planning can cause problems. The best way to avoid unexpected results is to thoroughly investigate the existing plumbing system before specifying any components or making calculations.
Unlike new construction, with a retrofit project, the contractor does not have every detail of the plumbing system meticulously documented in the mechanical plans. Retrofit projects mean installing new equipment with different specifications into existing—and often unknown—conditions, both upstream and downstream from the fittings and fixtures. It is important to talk to the people who know the system, such as building owners, facility managers, and maintenance personnel—anyone who knows the history of the building’s plumbing.
Step 1: Conduct the Assessment
Conducting a thorough assessment means inspecting the plumbing system and measuring as many performance variables as possible. Information should be gathered from three key areas: upstream, downstream, and at fixtures and valves.
Upstream
Pressure (static, dynamic, pressure over time)—Static pressure readings are a good starting point, but they are not the “tell-all” for the health of a system. Static pressure, working pressure, and recovery (the time for the system pressure to return to the static readings) are vital to determining a system’s response and capacity. Very high static readings (above 80 psi) can be a warning sign, pointing to failing pressure-reducing valves (PRVs) or, much more concerning, a volume or capacity problem.
Piping diameter—It would seem logical that by taking thefixtures from 3.5 gallons per flush (gpf) to 1.28 gpf, the demand on a water supply system would be reduced. However, the opposite is true: The same amount of waste must be evacuated through a new fixture with half the water volume—in many instances, a smaller water spot and trapway.
Plumbing layout and number of fixtures being fed by each line—Is the building plumbed correctly with main lines? Are all branch lines sized correctly to meet the demands of the fixture counts?
Past history of building expansion—Have there been additions to the building’s footprint without increasing the water supply system capacity?
Water quality—Water quality is an often overlooked factor in water savings analysis. In piston valves, high amounts of sediment or sand shorten the life by wearing down the lip seal. This results in a shorter flush cycle, making it necessary to flush twice to clear the bowl. Diaphragms with unprotected bypass holes may experience run-ons if the sediment clogs the bypass, or they may develop much greater flush volumes if the bypass is partially blocked.
Fixtures and Valves
Document the manufacturer and model number of all the equipment to be replaced and assess the age and condition of the equipment. Gather the following information:
Flush volume rating
Any signs of leaking from fitting or fixture
Last maintenance or maintenance schedule
Downstream
Depending on the age of the system, the original waste line carry calculations were probably based on 4.5 gpf. Through attrition, the original fixtures may have been replaced to 3.5 gpf or 1.6 gpf. Further reducing the water to 1.28 gpf could result in downstream problems. Here are some red flags:
Problem or chronic line blockages or toilet backups
Poor pipe conditions, including corrosion, leaks, and cracks
Long horizontal waste line runs
Improper waste line slope
Signs posted in restrooms warning what not to flush down fixtures
Step 2: Determine the Feasible Options
Previously, water closets used up to five gallons in 90 seconds to flush and transport waste down the waste line. Now, 1.6 gallons is used in 20 seconds.
Once the assessment is complete, a more accurate picture of the available (and practical) options for the retrofit can be determined. Depending on the number of red flags raised, the scope of the project may need to be adjusted, taking into account the expected cost and anticipated water savings for each option. Possible upgrade options include the following:
Minor upgrade: Change out diaphragm kits.
Intermediate upgrade: Change out flushometers.
Moderate upgrade: Change out flushometers and fixtures.
Major upgrade: Change out the entire plumbing system.
Step 3: Prepare the Estimate
With the assessment complete, the most appropriate option can be selected and quoted to the customer. Then, it is time to start procuring materials.
Step 4: Test the Solution
Testing the planned savings strategy on one or two fixtures or restrooms before converting the entire building can provide valuable insights into the expected performance of the system. Be sure to test the most extreme cases first (i.e., fixtures farthest from the water supply or situations with the greatest demand).
Step 5: Expand the Upgrade to the Entire Building
If the test installation performs as expected, go forward with the project.
Commercial water savings projects are not only financially smart, they are environmentally responsible—and in some municipalities, legally mandated. Today’s technology can help achieve real and meaningful savings, but the reduced water volume can have unintended consequences if the plumbing system is not capable of adapting to the lower flow. With foresight and planning, risks can be avoided and water savings goals achieved.
New Technology Opens Doors to New Business Opportunities
FARO Technologies Inc.’s FARO® Focus S 350 Laser Scanners “are really allowing us to send one guy in to a project and capture in a few hours what a team of people used to do over the course of a week—field measuring, documenting, etc.,” said Mark Lamberson CPD, national virtual design and construction manager of Limbach Holdings Inc.
Limbach reaped the benefits of reality capture technology’s significant advantage over traditional measurement devices in terms of speed and accuracy when they completed a 3D laser scanning project earlier this year for a meatpacking business in downtown Detroit.
By taking the initial steps in embracing a service-side reality capture component, the company documented the site and provided Revit® models to ensure that a new piece of bulky equipment would fit in the physical space. This type of documentation is especially important in cities like Detroit, where century-old physical structures lack their original blueprints, and even in newer buildings, where upgrades and additions no longer match what was first constructed.
Earlier this year, in addition to two FARO scanners, Limbach purchased FARO’s SCENE Software, As-Built™ Software, and WebShare Cloud, a suite of three programs ideal for site documentation for building structures as well as plant and MEP systems that include piping or HVAC. Combined, the hardware and software solutions have helped the $568-million revenue company streamline costs, enhance the efficiency of their workflows, accelerate project completion, and, perhaps most importantly, navigate the ongoing health and safety restrictions related to COVID-19.
“COVID has required organizations, especially those like construction that are so labor-intensive, to rethink certain processes of their business,” said Kipp Ivey, a FARO applications business development manager who has been a technical advisor to Limbach for the past 10 years. “You think about it, certain states have restrictions to prevent access to particular facilities. Even certain companies now have the authority or right to determine how many people are allowed in a structure or building at any given point. COVID has now made companies think, ‘How do we mitigate human interaction and minimize the number of people that have to go onsite?’”
Post-COVID Building Prospects
Even as material costs for lumber are up from last year and logistical logjams challenge numerous supply chains, federal stimulus money combined with pandemic savings has increased opportunities for the engineering and construction industry. For companies like Pittsburgh-based Limbach, taking advantage of those opportunities means a dedicated push toward upping their efficiency gains while reducing their per-project spend—all without loss of accuracy or quality control. Recently the publicly traded company, which specializes in integrated building systems with expertise in the design, installation, management, service, and maintenance of HVAC, mechanical, electrical, plumbing, and control systems, sought to improve its MEP workflows by incorporating 3D laser scanning and reality capture solutions into its business model.
Increasingly, profiting from the “new normal” means selecting talented team members from all over the country, Lamberson explained. In a post-COVID economy in which companies seek to minimize the number of staff onsite for a project and also reduce their liability in case an employee falls ill or is injured on the job, the best-suited engineer might be in Ohio for one project and Florida in another. It is that type of staffing deployment precision that 3D laser scanning and reality capture technology help enable. “So the scanner is grabbing every detail, and I can share that file with all 10 branches of the company so that we can leverage the best people for the job,” Lamberson noted.
Thanks to the highly granular detail FARO’s Focus scanners capture (collecting millions of data points for point cloud generation in only a few minutes per scan), not only can Limbach document a given facility, they can provide a variety of additional customer services, including the following:
Logistics planning for newly selected equipment
Supplemental engineering documents on how best to connect the equipment to building services
The ability to return to the site to take subsequent scans, transforming a single scan of an as-built environment into a “living document,” updated to match any changes made
Site validation for off-site prefabrication to mitigate risk when fabricating assemblies for older facilities and enhancing the effects of industrialized construction
Automation Appeal
While naysayers might conclude that some of the post-COVID, technology-enabled health and safety improvements will wane in importance as the months progress, Lamberson is more optimistic. The new efficiencies and targeted deployment of personnel will persist. Time savings and money savings are not pandemic-specific. And as the world has noted, COVID safety protocols have radically reduced the incidence of other illnesses and absences.
For these reasons, the new normal is here to stay. So if one employee onsite can do what three could do previously, it stands to reason that automation’s potential will increase. This is where the future lies—autonomous and semi-autonomous reality capture where a drone, operated remotely hundreds or perhaps thousands of miles away, can perform the same tasks a single human can onsite today. It is a future Lamberson and Limbach Holdings Inc. are eager to embrace.
Learn how to get the most out of FARO’s As-Built, SCENE, and WebShare software in these recorded webinars:
The ultimate goal of every heating and cooling installation is to provide the desired indoor climate at the lowest possible energy cost. Today’s advanced control technology means that, in theory, achieving this goal is possible. In practice, however, even the most sophisticated controllers do not always perform as promised. The result is lower-than-desired comfort level and high energy expenditure. The controllers can only perform their functions as specified if the three key conditions for hydronic control are fulfilled:
The design flow must be available at all terminals.
The differential pressure across control valves must not vary too much.
Flows must be compatible at system interfaces.
The best way to attain these three conditions is to perform a balancing procedure to ensure that the plant performs and operates as specified by the designer. Balancing can help find and remove issues ranging from incorrectly implemented balancing calculations to assembly errors, such as incorrectly installed check valves, and blocked filters. The balancing procedure allows you to immediately reveal the effects of any disturbances, identify the cause, and take corrective measures. This article summarizes IMI TA’s expertise in the three key hydronic conditions, describes how to identify when the conditions are not being met, what caused the problem, and how to solve it.
Condition 1
To ensure that the design flow is available at all terminals, hydronic balancing is necessary. Hydronic balancing prevents overflows in certain circuits from causing underflows in others. Balancing helps to detect possible oversizing of pumps and verifies that the plant provides the functions and performance as intended. See Table 1 for symptoms and solutions.
Table 1: Design Flow Must Be Available at All Terminals
Condition 2
For stable and accurate control, the differential pressure across the control valves must not vary too much. Again, hydronic balancing is required to meet this condition. In fact, hydronic balancing is the only way to identify and resolve the real causes of operational problems in the plant. See Table 2 for symptoms and solutions.
Table 2: Differntial Pressure Across the Control Valves Must Not Vary Too Much
Condition 3
For perfect hydronic control, flows must be compatible at system interfaces. To fulfil this condition, hydronic balancing is necessary so that the installed power in the plant can be delivered. The balancing procedure allows you to localize and resolve any hydronic problems. It also reveals possible oversizing of pumps and helps reduce pumping costs. See Table 3 for symptoms and solutions.
Table 3: Flows Must Be Compatible at System Interfaces
Other Benefits
Achieving the three key hydronic conditions can also bring the following benefits:
Faster system balancing and commissioning using the right balancing products and following proper engineering methods
Quicker return on investment and lower risk for owners with a well-optimized system, detailed commissioning reports, and happy tenants
Added flexibility for any system changes and future expansion (with no rebalance needed) for the designers and contractors
Victaulic Products and Expertise Help Current Overcome Labor Shortage to Meet Tight Timeline
For a demanding new warehouse project with a nine-month timeline, Current Mechanical counted on Victaulic’s experienced virtual design and construction (VDC) team, fabrication services, and grooved mechanical couplings to save installation time even as its workforce was stretched thin. “With the labor shortage, I am not sure we would have been able to complete this project without using Victaulic’s fabrication services,” said Steve Lewis, project manager at Current Mechanical.
Lewis continued, “Victaulic was able to model the room, create 3D installation drawings, and assist with spatial challenges when they arose with other trades as the project progressed. The biggest advantage to using Victaulic’s fabrication services was that we were able to reduce manpower and save critical time by allowing the construction crew to spend its time focusing exclusively on installing the piping system.”
Scaling Up With Control
In 2019, Sweetwater Sound, Inc. planned to expand its Fort Wayne, IN, campus by building a new 500,000-square-foot warehouse. Sweetwater began in 1979 as a recording studio in a Volkswagen bus and has since become the largest online retailer of musical instruments and professional audio equipment in the United States.
“The biggest advantage to using Victaulic’s fabrication services was that we were able to reduce manpower and save critical time by allowing the construction crew to spend its time focusing exclusively on installing the piping system,” said Steve Lewis, project manager at Current Mechanical, of the Sweetwater Sound storage facility project.
Storing musical instruments requires a climate-controlled environment, so maintaining appropriate conditions within the warehouse was critical. High humidity and fluctuating temperatures increase the risk of cracks, corrosion, and broken strings, so precise control is vital to preserving the integrity of the instruments in storage.
The project also had to be completed in just nine months, which was a challenge because of its large scope of work, including six air handling units (AHUs) with humidification; two chillers; a two-cell cooling tower; three boilers; heating, chilled, and condenser water pumps; an air piping system for conveyor systems; a domestic water system; and a reverse osmosis system for humidification.
The system installed also had to be scalable to accommodate future warehouse expansion. The initial concept was to build a giant central plant that answered the immediate needs of the facility but that was constructed so it could be expanded to meet the higher loads required to adequately control humidity and temperature in a larger space as more demand was made on the system.
Making Music Together
The contract was awarded to Current Mechanical, a Fort Wayne-based contractor that specializes in refrigeration, plumbing, HVAC, process piping, medical gas piping, and fire protection services. Current Mechanical had a solid track record with Sweetwater, having previously completed work for two other warehouse facilities, as well as its corporate office in Fort Wayne.
Although Current Mechanical had worked with Sweetwater before, the company had not installed the type of humidification system that was required for this new-build warehouse. Additionally, they were also undertaking this project at a time when their workforce was stretched thin. Current Mechanical needed a partner that could expedite and simplify installation to relieve some of the pressure on its limited crew and provide fabrication to facilitate site work.
Current Mechanical’s successful partnership over the past 15 years with Victaulic, the leading producer of mechanical pipe joining solutions, made the decision to reach out for support an easy one. By joining forces, Current Mechanical would not only have access to Victaulic’s experienced and knowledgeable VDC team, they also would benefit from the company’s fabrication services. And by using grooved mechanical couplings, which are 10 times faster to install than welded joints, Current Mechanical could streamline installation with its limited workforce, which was an enormous benefit on a project that was understaffed from the outset.
Managing Last-Minute Changes
Victaulic’s VDC team proved its value throughout the project, identifying potential issues, working rapidly to address them, and responding quickly to engineering design changes.
Sweetwater anticipated expanding its new warehouse, which would necessitate scaling up temperature and humidity control, so this project incorporated four large AHUs, all of which required triconnection coils. Problem-solvers at Victaulic addressed this requirement by using a series of single-coil AHU drops, which Current Mechanical was able to install in only four days.
“One of the last steps before issuing fabrication spools is to issue preliminary drawings for review and signoff,” said Brandon Horton, territory sales manager at Victaulic. On this project, “we received guidance from the mechanical engineer that required last-minute changes. Our VDC group was able to adapt and make the applicable adjustments needed.”
Once the revised preliminary drawings were approved, Victaulic’s VDC team began the fabrication process, which included spooling, fabrication maps, cutting lists, truck loading logs, and material procurement.
“Making changes, especially during fabrication, can be a challenge, but it’s incredibly important to make sure everything will meet layout and design intent,” said Josh MacMurray, piping coordinator at Victaulic.
Pulling all the pieces together for seamless execution requires a true team effort. “It’s quite a collaborative ecosystem,” said MacMurray. “There are modelers on one end developing quantities, then they pass it on to customer care to allocate and prepare for production. We also work with the fabrication team to make sure the right quantities will be at the right place at the right time.”
Victaulic provided on-site support and allocated all of the materials ahead of time, which was particularly valuable for the large-diameter pipe, which was not stored by the contractor and not available from local distributors. This approach meant materials could be released as needed for each phase of construction, and the necessary materials were onsite to permit construction to continue according to plan.
Innovative Solutions
Because of the size of the warehouse and its eventual expansion plans that would necessitate scaling up temperature and humidity control, this project incorporated four large AHUs, all of which required triconnection coils. Problem-solvers at Victaulic addressed this requirement by using a series of single-coil AHU drops. “This was an example that really showed the flexibility of our product lines,” said MacMurray.
As critical as this solution was, of equal significance was the product’s ease of installation. Although the contractor feared the workaround would be labor- and time-intensive, because of the simple design of the Victaulic catalog item, workers were able to complete the AHU drops in only four days.
Another “first” on this project was the installation of Victaulic’s QuickVic™ SD Installation-Ready™ System for small-diameter pipe. Used on the compressed air system that moves the conveyors that transport instruments through the warehouse, these products featured a thermally diffused zinc coating for improved corrosion resistance.
Additionally, Victaulic’s globe-style balancing valve was a key advantage for this project. Globe-style valves are preferred over ball-style valves because they provide much more accurate flow control of the heating and chilled water through the AHUs, humidifiers, and dehumidifiers.
Working together, Current Mechanical and Victaulic were able to successfully deliver the project on schedule. Even more important, the groundwork has been laid for Sweetwater to continue to grow for future encore performances.
For more information, visit www.victaulic.com. MCAA thanks Victaulic for being an MCAA sponsor.
CRW Mechanical won the bid for a parking garage’s gas piping project by switching to a Milwaukee®M18™ Force Logic™ Long Throw Press Tool rather than using a traditional all-weld approach. The Press Tool saved CRW Mechanical 15 percent on the project’s labor costs, and the crew saved 125 hours—all with just one Long Throw Press Tool onsite.
For CRW, located in the Washington, DC, area, the project “wins” include the following:
The Long Throw Press Tool decreased labor costs by 15 percent compared with an all-weld job, allowing CRW to reduce its original bid and win the job.
The lower bid allowed the Columbia Gas utility to green-light the large gas pipe project, which had been on the back burner for years.
The crew on the jobsite saved 125 hours using just one Long Throw Press Tool, completing each fitting in seconds.
The Press Tool installation meant a gain of about 25 minutes every time one of the job’s 300-plus Viega® MegaPress® XL® fittings was installed. In total, the Press Tool saved the CRW crew 125 hours—more than five days—on the project.
Work started during the COVID-19 pandemic, but Columbia Gas of Virginia had been eyeing the large undertaking for years. The parking garage, located at a Worldgate Plaza office building in Herndon, VA, was built in the 1980s with indoor gas meters. The utility needed the meters moved to the exterior.
Utility managers were motivated to get the long-delayed project done. A Columbia Gas line had been placed on the property five years earlier, and the line was just sitting there—dead. The utility contacted CRW and asked for a price. However, CRW’s original bid for an all-weld project was considered too high.
Pivoting to Press Tools
Rudy Ford, president of CRW, was evaluating solutions to get the deal done when he viewed a Milwaukee Innovation display during a socially distanced mini-trade show sponsored by the Mechanical Contractors Association of Metropolitan Washington. Talking to Sales Representative Hyojon Robbins at the event, Ford saw 4” cordless “jaws” on a table. Ford commented, “Wow, that’s ProPress for copper,” and Robbins replied, “No, that’s up to 4” MegaPress for steel.”
Inspiration struck Ford. Milwaukee’s products were the solution for the parking garage project. Robbins confirmed that the tool is fully compatible with 2½” to 4” Viega MegaPress XL fittings for steel pipes. Ford said, “I literally left the tool display, came back to the office, and repriced the job that same day based on labor savings.” Robbins worked with Viega to go over the features and benefits of the tool, and Ford consulted with partners at Viega, too.
“I wanted my guys to work,” Ford said. “It was during COVID-19, so the garage was empty. We needed the work, and this was an opportunity to make the price attractive to Columbia Gas.”
Ford lowered the bid 15 percent based on labor savings alone. “We just went for it,” he said.
Savings Plus Safety
Because welders use an open flame even in tight spaces, a hot work permit is required, along with a second person for fire watch. These steps are not needed with the Press Tool, and neither are materials such as welding gas, filler material, torches, or cords. With welding, a wet system must be drained. The Press Tool using XL rings connects wet systems, skipping the draining stage and saving time.
Even during COVID-19, a few dozen cars were parked in the garage. Safety precautions in an open, active parking garage include protecting vehicles by cordoning off areas. Screens are set up to shield pedestrians from possible arc flash. Smoke and exhaust from welding must be cleared out of the air. Because CRW used the Long Throw Press Tool, none of those precautions were needed on the jobsite.
CRW Foreman A. J. Hodges summed up the advantages of the new approach. “We worked with 5,000’ of pipe on 19 different lines. Pressing made the whole job easier. The Press Tool made a dramatic difference to me and the work, plus it was easy to use,” said Hodges.
Hodges, a welder, put the project finish time into perspective. “If I had been welding, I’d only be a quarter of the way done.” He confirmed that no gas leaks were found in presses made on the 5,000’ of pipe. Ford added, “The gas company likes the results. They take pictures every time they’re out there.”
For more information, visit www.milwaukeetool.com. MCAA thanks Milwaukee Tool for being an MCAA sponsor.
When Bayer’s Plumbing of Newburgh, IN, needed a modern grease interceptor solution for a local deli, they turned to MIFAB for a product that cost less and was much easier to install than traditional riser systems, according to Matt Pry, project manager. Because local regulators had been approving poly hydromechanical tanks, Bayer’s Plumbing proposed a MIFAB high density polyethylene (HDPE) interceptor for the long-time local dining staple EMGE Deli in Evansville, IN, winning the job.
Pry said that the MIFAB BIG-MAX 750 (75-gpm HPDE hydromechanical interceptor) product was the perfect fit. “It is a good product, well-built, with a better-than-competitive price point. The generic corrugated riser pipe really is what put it head-and-shoulders above its competitors in this space.”
Making the Move to HDPE
When MIFAB opened its doors in 1982, they had two products: access doors and interceptors. Today, interceptors are still a major part of the more than 14-division MIFAB brand. In 2010, MIFAB began getting requests for HDPE interceptors. After some research, MIFAB saw that HDPE made up a very small but rapidly growing share of the market, so they made the leap to HDPE. Today, MIFAB has the largest selection of plastic grease and specialty interceptors in the U.S. plumbing market. The fast growth of the market can be attributed to contractor demands for products that are easier to install and foresight by local jurisdictions seeking to protect the environment and their sewer systems.
With concrete and steel interceptors, it is not a question of if these units will fail but when. Steel units have an average life expectancy of seven years, and concrete units have an average life expectancy of 12 years because of the corrosive effects of the acid in the waste. MIFAB’s HDPE grease interceptors have a lifetime warranty, and they ensure that the waste will not be going into the ground or passing into sewer systems, where it can have a very detrimental effect.
Speedy Separation
The key to a grease interceptor functioning properly is separation speed and capacity. Gravity-fed interceptors use time-based separation, and it takes a lot of time for the grease to separate and float to the top of the tank. Hydromechanical units are flow-based, which means they use a flow control device at the inlet to slow the grease-laden material down so that it separates very quickly upon entering the tank.
Gravity-fed tanks must be pumped out when they are only a quarter full. After that point, the unit will start passing grease into the sewer system—a huge problem that can result in large fines for the owner. With hydromechanical systems, the unit can almost be full and still have excellent separation. Effectively, a smaller hydromechanical unit has more capacity than a gravity unit. As a result, the designer and the contractor do not need more space to install the larger tanks.
Easier Installation
Steel units can be difficult to handle and can easily cause cuts to the hands. Inevitably, the seal on the interceptor will fail, which allows waste and odors to escape into the kitchen, resulting in a call back to the installing contractor.
Concrete tanks pose even bigger coordination issues. The contractor may need to rent a crane or schedule—down to the hour—when the boom truck will arrive. If the hole for the tank is not properly prepared, the truck will leave but still charge for the time. A typical 1,500-gallon concrete unit can weigh up to 15,000 pounds. On the other hand, a 1,500-gallon HDPE unit will only weigh around 1,500 pounds. These plastic units can be stored above ground on the jobsite and moved around easily with a fork truck or forklift.
Finally, manhole risers have always been an issue, because the contractor will generally not know the finished grade until the end of the project. At that point, the contractor must order custom-height risers that are expensive and require a long lead time to produce. MIFAB has a patented riser system that uses generic corrugated plastic pipe that can be cut to fit. The pipe is inexpensive and readily accessible from your local plumbing wholesaler.
This issue of Smart Solutions highlights new technology, products, and services to help meet continuing labor and other challenges in the indus
