CircuitSolver Union Cold Water (CSU-CW)
The CircuitSolver® Union Cold Water thermostatic balancing valve automatically and continuously balances a cold water recirculation system to discourage Legionella bacteria colonization, reduce stagnation, and ensure “residual chlorine” is distributed throughout the system.
The CSU-CW valve features a union with an optional check valve built into the body of the CircuitSolver® to reduce the number of system components to be installed and minimize potential leak points.
The valve features an integrated O-ring and is factory assembled for a leak-free seal.
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How It Works:
The CircuitSolver® Union Cold Water valve is installed at the end of each branch or riser in a domestic cold water system (DCWS) to automatically and continuously monitor the water temperature. Utilizing our proprietary thermal actuator as the controlling element, the valve will modulate open or closed in response to changing temperatures to maintain a specified temperature in the line.
The valve will be in its closed* position when the water temperature in the supply branch is under the valve’s set-point and only opens to establish flow when it rises above the set-point. This automatic response to temperature allows the balancing valve to adjust dynamically to the varied usage rates in a DCWS throughout the day.
*Note: The valve will never fully close, allowing a small flow bypass to the return to avoid dead-heading the recirculation pump. The limited flow to your return line will reduce system wear, electricity, and water usage and improve overall system operation.
Valve Components:
The CircuitSolver Union Cold Water valve comprises 100% stainless-steel components, a high-quality O-ring, and an optional check valve.
| ITEM | DESCRIPTION | MATERIAL |
| 1 | Valve Body w/ Union Threads | 300 series stainless steel |
| 2 | Union Nut | 300 series stainless steel |
| 3 | Female Threaded Inset | 300 series stainless steel |
| 4 | Plug | 300 series stainless steel |
| 5 | Operating Spring | 300 series stainless steel |
| 6 | Thermal Actuator | 300 series stainless steel |
| 7 | O-Ring | Buna-N |
| 8 | Check Valve (Optional) | Glass Filled Noryl |
Typical Applications:
The CircuitSolver® Union Cold Water thermostatic balancing valve can be used in any building with a domestic cold water recirculation system to keep the water temperature in branches or risers evenly distributed, which minimizes heat gain and reduces the risk of Legionella and other bacterial growth.
These systems have become more prominent in VA hospitals because of the VHA 1061 directive; however, any commercial building such as schools, hotels, high-rise, and multi-family apartment buildings can benefit from implementing a cold water recirculation system to protect the water lines from the risk of bacteria colonization during periods of low flow or non-use.
Benefits:
- All stainless steel – corrosion resistant construction
- High thrust actuator keeps orifice free of debris
- Union with integrated O-ring for a leak-free seal
- Optional check valve built into the body
- Never fully closes, some water always passing through
- Long service life and 3-year warranty
Certifications:
- NSF/ANSI/CAN 61 and 372 Certified
- Lead Free
- Fully compliant with Section 1417(d) of SDWA, the Safe Drinking Water Act
- Supports efforts toward LEED Certification
- Complies with the Buy American Act
Specifications:
- Sizes: 1/2”, 3/4″ & 1”
- Max. Working Pressure: 200 PSIG/14 BAR
Using CircuitSolver® makes balancing the system so easy. The valves automatically adjust themselves, so you don’t have to check each valve once installed, and there are never any callbacks for issues. Arturo Hernandez GJM Engineering in Los Angeles, CA
The University of South Florida - On startup of this install, the system automatically balanced itself in under 3 hours, all without manual labor thanks to CircuitSolver®. The plumbers actually went out a did another job, went to breakfast, and when they came back, the system was balanced. Mike Bishop V.P. of Engineering at RGD Consulting Engineers in Jupiter, FL
I haven’t come across another product like CircuitSolver®. Once you install the valves you never have to adjust them, unlike manual balancing valves where you have to balance every single valve you install. Richard Parker Plumbing Contractor at Pan-Pacific Mechanical in Fountain Valley, CA
Rittenhouse Hill Apartments - We had a very complicated apartment restoration involving 47 risers. CircuitSolver® saved a lot of time, installed easily, used smaller recirculation pumps to save energy & wear, and continues performing well. Ron Miller President at Adelphia Plumbing in Philadelphia, PA
I try to have CircuitSolver® specified on as many jobs as possible due to the simplicity of it. Eric McTee Plumbing Designer at ME Engineering in Golden, CO
CircuitSolver® is a great product - I have never used anything like it. Robert Schrieber Maintenance Manager at Embassy Suites in Brunswick, GA
It was taking over a minute and a half to get hot water, and now it’s down to 15-20 seconds…also a huge conservation of water…it was a fairly simply retrofit. Robert Albanese Owners Representative for The Austonian in Austin, TX
CircuitSolver® is a game changer in balancing DHWS and I would definitely use it as a standard in future projects. Matt Trevino Plumbing Engineer at DBR Engineering in San Antonio, TX
CircuitSolver® was able to automatically balance the system when engineers could not. Mark Wilmink MarkCo Plumbing in Florence, KY
By eliminating the conventional method of using fixed flow balancing valves and installing CircuitSolver® valves instead we were able to resolve our lack of hot water in some sectors of the hospital issue instantly. André Renaud Building Consultant at Mental Health University Institute of Quebec
Simply stated, CircuitSolver® valves are easy to install and work very well with no issues to date. They’re efficient and take the time typically required to manually balance systems at the end of the project out of the equation. Christopher Meurer Plumbing Operations Manager at J.C. Cannistraro, LLC in Boston, MA
CircuitSolver® is a great product - I have never used anything like it. Robert Schrieber Maintenance Manager at Embassy Suites in Brunswick, GA
It usually takes 2-3 plumbers, 2-3 days to balance a system of this size, but by using CircuitSolver® this process was done instantly. Huge savings in terms of time and effort typically devoted to the balancing process. Stephan Thompson Plumbing Contractor at E.M. Duggan Inc. in Canton, MA
CircuitSolver® valves are efficient and take the time typically required to manually balance systems at the end of the project out of the equation. We have started up systems in the afternoon to come in the next morning to find hot water perfectly balanced throughout all risers and zones. Christopher Meurer Plumbing Operations Manager at J.C. Cannistraro, LLC in Boston, MA
CircuitSolver® is a great product. The valves automatically adjust to changing temperatures and pressure drops unlike manual and automatic balancing valves. Plumbing Contractor Production Plus Plumbing in Vista, CA
Right after the installation the general manager went around the building and there was a noticeable difference with quick delivery of hot water. Andy Crossland Principal Mechanical Engineer at Crossland Engineering LLC in Honolulu, HI
The advantages of the system are an efficiently balanced system, saving time testing and balancing the system, lower utility bills and reduced water usage. Luke Holding Project Engineer at The Beck Group in Dallas, TX
Before CircuitSolver®, we would have wait times between 5-7 minutes for hot water on the higher floors. Since we have installed CircuitSolver® valves, we are getting hot water when we need it and have not had a single complaint. Robert Schrieber Maintenance Manager at Embassy Suites in Brunswick, GA
USC Villages Student Housing - By using CircuitSolver®valves, we saved time and money by not having to balance the system or make any adjustments. It made the process much easier and smoother. Richard Parker Plumbing Contractor at Pan-Pacific Mechanical in Fountain Valley, CA
The Da Vinci Project - By using CircuitSolver® balancing valves, we were able to save both time and money. The start-up process was much faster by not having to manually adjust each valve. After installation, the system balanced itself and required no maintenance. Arturo Hernandez GJM Engineering in Los Angeles, CA
CircuitSolver® makes balancing the system so easy. We don’t have to manually set each line or make any adjustments. We have had absolutely no balancing issues since we started up the system. Richard Parker Plumbing Contractor at Pan-Pacific Mechanical in Fountain Valley, CA
CircuitSolver®, being that it is an automatic balancing valve, just makes the job of balancing an intricate hot water system that much easier. David Texter Plumbing Engineer at Browne Engineering in Cincinnati, OH
I would tell any contractor, building engineer, and mechanical engineer if you are looking at CircuitSolver®, it is simple, it is easy to use, and it works right from the get-go. Chris Watts Plumbing Service Manager at Braconier in Denver, CO
What an awesome little device these guys make. It’s a no-brainer. Andy Crossland Principal Mechanical Engineer at Crossland Engineering LLC in Honolulu, HI
CircuitSolver® makes the initial startup so easy. When we turned it on, the valves balanced the whole system without us having to make any adjustments. We never have any issues when installing them in our projects. Plumbing Contractor Production Plus Plumbing in Vista, CA
When we install CircuitSolver® valves, it corrects the client’s hot water circulation problems, and everything operates as it’s designed. We are going to keep installing them. Jason Putnam Project Manager at Douglas ORR Plumbing in Miami Springs, FL
We’ve used CircuitSolver®s exclusively now for several years in every application we can. Simply stated, the product is easy to install and works very well with no issues to date. Christopher Meurer Plumbing Operations Manager at J.C. Cannistraro, LLC in Boston, MA