Designed and manufactured in the United States, this advanced self-actuating technology threatens to disrupt traditional hot water balancing practice because it enables plumbing designers, engineers and contractors to install a CircuitSolver® valve at the end of each branch and watch the system balance itself. This thermostatic valve automatically controls the hot water flow (see illustration) ensuring hot water is delivered consistently to all faucets without the need for manual balancing.
CircuitSolver® completely eliminates the need for time consuming and expensive manual balancing procedures and equipment. It is a self-actuating, in-line, thermostatic recirculation valve which automatically and continuously adjusts flow to maintain the specified temperature at the end of each domestic hot water supply line.
The thermal actuator inside CircuitSolver® modulates the valve between open and closed in response to changing water temperature caused by heat loss, water demand, or any other reason. This constant, automatic response to water temperature enables each hot water branch to quickly and consistently deliver the right temperature of hot water to each connected fixture. It also minimizes flow through the system by only allowing water that cools below the set point to flow to the return, eliminating the need for oversized recirculation pumps which cause system wear and waste energy.
Discover ThermOmegaTech’s complete line of quality, self-actuating, thermostatic valves for a variety of plumbing applications.
CircuitSolver® Balancing Valves
CircuitSolver®
CircuitSolver® Union
CircuitSolver® Union Assembly
CircuitSolver® Union Assembly with Strainer
CircuitSolver® Union Assembly ProPress
CircuitSolver® Union Assembly ProPress with Strainer
Eric McTee of ME Engineers, Inc in Boulder, Colorado
As a Project Manager at ME Engineers, Plumbing Designer Eric McTee, CPD, is responsible for all aspects of a plumbing system’s design for new constructions and remodeling projects. In domestic hot water recirculation systems, McTee specifies CircuitSolver® thermostatic balancing valves. “I try to have CircuitSolver specified on as many jobs as possible due to its simplicity of it,” states McTee.
Some notable projects where he specified CircuitSolver® are the Laurel Cherry Creek Condominiums in Denver, the Broomfield Service Center, the Tupelo Honey Cafe in Denver, and Lucky Strike Bowling Centers in multiple locations.
McTee, an ASPE’s Denver Chapter member, first learned of CircuitSolver® from a manufacturer’s representative in 2014. “Straight from the beginning, I liked how it was a simple product that makes balancing a domestic hot water recirculation system really easy; it’s easy for the contractor and easy for the owner,” McTee says. “You install the CircuitSolver®, set it, and forget it. You do not have to worry about the system accidentally being knocked out of balance. I enjoy having a product that allows the system to work seamlessly,” McTee states.
McTee points out that once installed, the system is balanced. There is no way for the owner or a maintenance worker to adjust the valve accidentally and then need to call a balancing contractor to get the system back in line. “That is the number one cause of hot water circulation failures that I have seen,” states McTee.
“The initial cost of the CircuitSolver® is a little higher than a traditional balancing valve, but installation is faster and cheaper.
The system is already balanced and does not require a balancing contractor. [With CircuitSolver®,] you get a better-performing system that you do not have to worry about,” McTee emphasized.
“Any owner planning to hold onto a building for a long time needs to look past the initial cost and look at life-cycle cost. CircuitSolver® would save them money in the long run.” McTee typically specifies the CircuitSolver® assemblies with check valves because it makes it super easy for the contractors to install.
When asked what he likes most about these balancing valves, McTee said, “Compared to manual balancing valves, it is just a superior product. You will get better performance and system longevity out of it since you do not have to worry about rebalancing in the future. I really like the valves…because it makes [the system] easy to control. It is a product I will continue to specify for the rest of my career.”
The USF is a public university with its main campus located in Tampa. About 10% of the school’s almost 40,000 undergraduate students live in one of the 44 on-campus dormitories. After temporarily shutting down during the height of the coronavirus pandemic in 2020, dorms reopened to students in the Fall of 2021.
THE OPPORTUNITY
Beacon Hall, the newest addition to the university’s on-campus dormitory buildings, opened in August of 2017. A coed, six-story construction, the dorm houses 378 residents in a mix of traditional and suite-style rooms.
Since opening, the 5th-floor gang shower, which is located in the center of the floor with student rooms lining the exterior of the building, had experienced a lot of hot water issues.
Mike Bishop, VP of Engineering at RGD Consulting Engineers stated: “Students used to turn on the showers, go to breakfast for 30 minutes, then come back to shower when the water was hot. Otherwise, they were taking a cold shower.”
A major inconvenience to students and a huge waste of water for the university, the system’s hot water demands needed to be re-evaluated.
THE INSTALLATION
After unsuccessful attempts to rectify the hot water supply and balancing issues, the developer contacted RGD Consulting Engineers.
Mike Bishop discovered that the manual balancing valves were a major roadblock in the DHW system functioning correctly due to its inability to adapt to changing system demands, and, with no question, recommended CircuitSolver thermostatic balancing valves.
Working with Spirit Group, a CircuitSolver representative in Florida, thirteen ½” CircuitSolver valves were installed at the end of each branch and one ½” CircuitSolver was placed on the return line to the water heater.
HOW THE CIRCUITSOLVER WORKS
The CircuitSolver® is a thermostatic balancing valve that automatically and continuously adjusts flow through a DHW system to maintain a specified temperature at the end of each hot water supply line. This keeps the system fully balanced with hot water available at all times and on all floors, even with variable and intermittent demands.
On startup, the system automatically balanced itself in under 3 hours, all without manual labor. “In the meantime, the plumber actually went out a did another job,” Bishop mentions, “Then they went and got breakfast, and when they came back [the DHW system] was balanced.”
THE RESULT
Since the installation of CircuitSolvers, all balancing issues in the Beacon Hall dormitory have been resolved. Students are able to take hot showers without 30-minute wait times, and complaints have ceased. Water usage has plummeted, and the extra recirculation pump was removed, effectively reducing utility usage.
As for Mike Bishop, in this balancing case study, he says that the contractor on the job reported a favorable experience. “He was ecstatic! This was his first CircuitSolver job, but he’s going to start using it everywhere.”
To address the demands of domestic hot water balancing and the specific design requirement of different systems, the CircuitSolver thermostatic balancing valve offers a variety of sizes and configurations to satisfy any Domestic Hot Water System (DHWS) design.
1. My lines are prone to calcium buildup; will CircuitSolver clog?
No, it won’t. The CircuitSolver actuator’s modulation is powerful enough to force out any buildup in its path, developing over 40 lbs. (18kg) of thrust, which is more than enough to break loose any mineral buildup.
Note that mineral buildup is unlikely to occur in CircuitSolver since it mainly occurs where there is a heating surface or a very small leak.
2. Does CircuitSolver shut off tightly?
No. A small leakage (0.2 GPM) is built into CircuitSolver valves even when “closed” to avoid dead-heading the distribution branches.
In some applications where the water distribution piping is occasionally chemically or thermally sterilized, the leakage allows enough of this flow through the system to sterilize the line, regardless of temperature.
3. How much does CircuitSolver cost?
Compared to traditional manual balancing methods, CirucuitSolver reduces overall costs by 44% by saving money on components and labor. See our study here.
4. Where has CircuitSolver been installed?
All over the place! Take a look at our installation map to see where CircuitSolvers are installed near you.
5. How do you select the correct set-point for CircuitSolver?
As described in the product sheets, the “XXX” in the model number is the desired return line temperature. For example, you want the return temperature to be 110°F, and the line size is 3/4”, you would select a CS-3/4-110.
For more FAQs on our CircuitSolver product line, visit our FAQ page.
To ensure a supply of hot water is provided at every fixture in a timely manner, buildings typically utilize a domestic hot water recirculation system in their plumbing design. DHWR systems are considered a best practice in commercial, multi-family, and institutional buildings, especially if designed with thermostatic balancing technology and accurate pump size calculations and other considerations, as listed in this article.
Such recirculation systems should guarantee occupant comfort, safety, and code compliance, as well as water and energy conservation.
When designed properly, a DHWS will provide adequate amounts of water at the prescribed temperature to all fixtures and equipment during all times of use while ensuring a cost-effective, efficient, and lasting installation.
How to Improve Your DHWS Design with Thermostatic Balancing Valves
Understand the Importance of Balancing Domestic Hot Water Recirculation Systems
A DHWS needs to be properly balanced to ensure hot water is readily available on-demand, on all floors, and at every fixture.
Water is “lazy” and will flow to the path of least resistance. To ensure there is no short-circuiting and all branches have adequate hot water, a restriction point is needed to create only the flow required to offset heat loss in each branch or riser.
Typically relying on multiple branches off the hot water supply line, domestic hot water systems need a device that can respond dynamically to changing needs.
Traditional balancing valves require manual adjustment to create the flow rate needed in each branch.
Challenges associated with manual balancing:
Iterative and time-consuming
Difficult to properly set to the correct parameters
Static and unable to adjust to the changing conditions of a dynamic system.
DHWS are balanced when unoccupied, so “callbacks” are common to rebalance the system when the building becomes occupied.
Dynamically designed, these valves adjust in response to heat loss and demand fluctuations without the need for manual balancing, which ultimately reduces labor time and costs and eliminates hot water complaints.
Calculate Flow Rate to Offset Heat loss
When designing a DHWS, you should calculate the flow required to offset heat loss at the system level. Balancing flow will eliminate the risk of short-circuiting.
Minimizing flow velocity should also be considered to prevent any erosion in copper piping. Erosion can occur when high water velocities and hot water mix in the copper piping.
Ensure Accurate Pump Size Calculations
Inaccurately sizing the recirculation pump in your DHWS can result in many problems that will waste time and money in the long run.
Sizing Too Smallcan result in not enough flow to maintain temperature throughout the system.
Sizing Too Bigtends to be unnecessarily expensive due to the need for larger pumps and wasted energy. Oversized recirculation pumps can wear out copper piping and cause pinhole leaks as well.
To ensure an efficient and economic thermostatically balanced DHWS system, follow ASPE guidelines to determine the recirculation flow rate needed to offset heat loss.
For more information on recirculation pump sizing and demonstration examples of heat loss calculations, check out our Recirculation Pump Sizing Guide.
To determine the possible effects of hard water on CircuitSolver’s longevity, ThermOmegaTech has been conducting an ongoing hard water test on the same balancing valve at their headquarters in Warminster, PA since 2013.
A single valve was installed in the facility’s hard water on January 15, 2013, with its performance and appearance evaluated annually. 2021 is the 8th consecutive year that the test CircuitSolver has continued to operate efficiently, with no signs of mineral deposits, wear or fatigue in the installation.
Ongoing Effects of Hard Water Study
To determine exactly how hard the water was before the valve was installed, QC Laboratories, a certified test laboratory in Warminster, PA, analyzed collected water samples and found the hardness of ThermOmegaTech’s water to be 229 mg/L – this is considered “very hard” water.
Typical effects of hard water are often damaging and can include mineral deposits, scale buildup on plumbing fixtures, impaired flow rates, and stained appliances.
Test CircuitSolver as of 2021
The photos below display the test CircuitSolver and its disassembled components when they were removed during the latest inspection in 2021.
With no visible signs of mineral deposits, wear, or fatigue, the CircuitSolver continues to cycle normally after 153,120 modulations to date.
After disassembly and inspection, the CircuitSolver was reassembled and returned to the test installation. Click here to read the full study.
Since its debut in 2013, the CircuitSolver thermostatic balancing valve has been proven to make a significant difference in DHWS performance and durability.
To learn more about CircuitSolver and our other plumbing products, click here.
Since its discovery in the summer of 1976, Legionella bacteria has been an ever increasingly hot topic in the plumbing industry, seeming to lurk in pipes and water systems, waiting to strike in a moment of lapsed attention or vigilance.
According to Smithsonian Magazine, the CDC reports that as of 2018, cases of Legionnaires’ Disease, pneumonia caused by aspirating the Legionella bacteria, have risen significantly. With nearly 10,000 cases reported in 2018 alone, Legionnaires seems to be running rampant in modern water systems.
While some attribute the sharp rise in case numbers to improved reporting, awareness, and testing methods, it has also been suggested that aging infrastructure and climate change could be contributing factors.
While prevalent in modern plumbing systems, Legionella bacteria only presents a risk when able to colonize, typically in stretches of piping with warm, stagnant water. For many buildings, simple changes to system design and management procedures can significantly reduce the prevalence of Legionella bacteria and inhibit growth before it can begin.
1. Avoid “Dead Legs” in Piping Design
Minimizing the distance between supply lines and fixtures in your system design can reduce areas of stagnation in the hot water piping which could accumulate scale and biofilm buildup, a prime location for Legionella bacteria to set up shop.
2. Maintain Water Temperature Control
Legionella bacteria flourishes in warm water with comfortable temperatures ranging from around 70°F to 115°F. Storing water at temperatures above 120°F will generally help prevent colonization.
To prevent bacteria growth, specify hot water tanks that store water above 140°F (60°C) and use a mixing valve to recirculate it to the fixtures at 120°F (48.9°C) to comply with anti-scalding regulations.
3. Keep Pumps Running Continuously
Keeping your recirculation pumps running at all times will keep water flowing and prevent bacteria from grouping together and adhering to pipe walls.
4. Perform Routine Maintenance of Equipment
The CDC recommends cleaning water tanks routinely including periodically draining the system to remove scale and sediment. This will prevent biofilm, organic debris, and corrosion from contaminating your water system.
CircuitSolver Sanitary Flush Valve
For domestic hot water systems using a heat-and-flush thermal disinfection method to prevent Legionella bacteria growth, balancing during the flush is essential to ensure thorough sanitation.
CircuitSolver Sanitary Flush Valve utilizes two thermal actuators for automatic thermal balancing of the system; one for normal DHWS operation, and the other for thermal disinfection. Click here to see how it works.
The dynamically designed CircuitSolver® balancing valve is sweeping the nation, with thousands of installations and lots of happy customers from coast to coast with instant hot water at their fixtures!
CircuitSolver® thermostatic balancing valves are proven to effectively balance DHWS flow and deliver instant hot water, regardless of real-life demand fluctuations. Replacing the headache and callbacks commonly associated with manual balancing, CircuitSolver’s dynamic design save time and money, eliminate callbacks, and keep users happy.
Customers Are LOVING The CircuitSolver® Balancing Valve
“With CircuitSolver®, we could see results quickly. The valves were fully open during startup and gradually closed as each valve reached its set temp, rapidly getting hot water to each line.” – Kavli Institute UCSB
“With the CircuitSolver®, the flow rates are negligible compared to the 20-gallon per minute you would want to have with these 47-floor risers.” – Rittenhouse Hill Apartment Buildings
“A project this size would take 3 or 4 plumbers per building at least 2 weeks to get the system perfectly balanced. With CircuitSolver®, we were able to balance it automatically in much less time.” – USC Student Housing
“I haven’t come across another product like CircuitSolver®. Once you install them you never have to adjust it unlike manual balancing valve where you have to balance every single valve you install.” – Da Vinci Project
“Before we installed CircuitSolver®, we would have wait times between 5-7 minutes for hot water on the higher floors. We received a lot of complaints and would comp between 10-12 rooms a month. Since we’ve installed CircuitSolver® we are getting hot water when we need it and have not had a single complaint. It’s a great product. I’ve never used anything like it.” – Embassy Suites
Past CircuitSolver® Installation Projects:
Click on the images below to read real case studies on how CircuitSolver® saved building owners the headache and cost of manual balancing in their domestic hot water recirculation systems.
1. What is the GPM when the valve is closed? When CircuitSolver is closed it does not shut off completely and still allows a fraction of a gallon per minute flow. This allows it to better sample upstream water temperature changes, as well as better facilitate high temperature sanitizing cycles of the domestic hot water system. To determine the GPM, multiply the square root of the pressure differential across the valve by the Cv.
For example, if pressure differential is 4 psi, square root of 4 is 2, and 2 X Cv = GPM.
2. What is the full open rate of CircuitSolver? The published Cv flow coefficient for each valve size allows calculation of the full open flow rate. Multiply the square root of the pressure differential across the valve by the Cv to get GPM. For example, if pressure differential is 4 psi, square root of 4 is 2, and 2 X Cv = the full open GPM.
3. What is the highest temperature CircuitSolver can handle? CircuitSolver is rated to a maximum temperature of 250°F (121°C). All the valves can easily handle more than 212°F (100°C) which is the boiling point of water and higher than any water temperature in a domestic hot water system.
4. What is the pressure drop across a CircuitSolver? The basic approximation for the pressure drop across the CircuitSolver within a given branch utilize the following equation where Cv = design Cv and flow is the estimated flow to offset heat loss in the branch:
For this example – Cv = .85 (design Cv for ¾” CircuitSolver)
Flow = 1 GPM (estimated flow to offset heat loss in a given branch) ΔP = [GPM/Cv]2 = [1/.85]2 = 1.4 psi
5. Is there a warranty offered with the valve? Yes, the CircuitSolver product line offers a 3-year warranty.
Traditional manual balancing is labor-intensive and time-consuming, requiring several contractors to balance one valve at a time, often revisiting valves over and over to adjust for inadequate flow or temperature. Due to this, manual balancing inevitably leads to hefty labor costs and frequent callbacks to accommodate for the changing demands of a dynamic system.
The CircuitSolver® Solution
The CircuitSolver® thermostatic balancing valve automatically adjusts flow through a domestic hot water recirculation system to maintain a set temperature at the end of each supply branch.
Dynamic and self-modulating, CircuitSolver® balances a system in minutes and automatically directs hot water where it is needed, dynamically adjusting to satisfy changing system needs. CircuitSolver® effectively eliminates the need for manual balancing labor and callbacks, saving a substantial amount of time and money.
Cost Savings
In the Spring of 2020, CircuitSolver® conducted a nationwide survey of plumbing contractors to quantify the cost savings of replacing manual balancing valves with the CircuitSolver® thermostatic balancing valve. Data was collected on total costs associated with balancing a system including total labor time, employee salaries, required contractors per job, frequency of callbacks, and materials used.
The survey concluded that, when directly comparing the total manual vs. thermostatic balancing costs of a 10-story DHWS, implementing the CircuitSolver® balancing valve would reduce total costs by 44%. Click hereto see the balancing cost savings calculations!
The CircuitSolver®, a market-leading thermostatic and self-actuating balancing valve, continuously monitors water temperatures and automatically adjusts flow through domestic hot water recirculation systems to maintain a set temperature at the end of each supply branch, effectively eliminating the need for manual balancing.
CircuitSolver®, the fast-acting, dynamic valve, easily accommodates system demand variations by directing hot water where it is needed, ensuring instant hot water delivery across many floors and fixtures.
Offered in a variety of sizes and configurations including ball valves, integrated unions, check valves, strainers, and ProPress® ends, the CircuitSolver® effortlessly fits into any new or existing DHWS design.
Offering & Optional Configurations
With a variety of sizes and configurations available, the CircuitSolver® valve caters to your unique design specifications and individual needs.
CircuitSolver Install: Mental Health Institute of Quebec Case Study
The below CircuitSolver install case study features a project from our neighbors in the North.
Installation Site Overview
Aerial View of IUSMQ
The Mental Health Institute of Quebec (IUSMQ) is a hospital specializing in psychiatric care. Founded in Quebec City in 2009, the facility has more than 500 beds for short-term and long-term psychiatric care.
IUSMQ is a large building with up to 6 floors in some wings and a total floor area of about 160,000 m². To accommodate changing staff and patient needs, the IUSMQ’s main pavilion was recently renovated, with updates being made to the domestic hot water recirculation system.
The Opportunity
Instead of implementing an army of traditional hot water heaters to supply the sprawling facility, IUSMQ’s water supply is heated by a hospital-owned power plant and distributed throughout its wings and floors.
To account for the heat loss that occurred as the hot water traveled through the building’s long recirculation lines, the power plant had to intentionally “overheat” the water being delivered to IUSMQ.
However, as a result of new standards and regulations, the hospital was required to adjust the temperature of incoming water to a safer level.
According to the building’s consultant, André Renaud, this resulted in the hospital experiencing a lack of hot water in some areas.
The Installation
Renaud initially reviewed the recirculation system to determine the fixed flow rate needed to offset heat loss and consumption. According to his calculations, the main recirculation piping would not be able to withstand the high flow rate required due to the risk of premature erosion of the copper piping.
Due to this, the consultant chose to replace the system’s fixed flow valves with 108 CircuitSolvers.
Installed in-line, CircuitSolver is a self-actuating, thermostatic recirculation valve that automatically and continuously adjusts flow to maintain a specified temperature at the end of each domestic hot water supply line.
CircuitSolver bases dynamic flow rates solely on fluid temperature, easily accommodating for passive system heat loss and demand fluctuations, with no need for re-balancing.
By switching to the CircuitSolver, Renaud eliminated the labor and guesswork associated with the manual balancing of fixed flow valves.
The Result
After a quick and easy install and almost instantaneous automatic balancing, hot water is now available throughout the entire main pavilion on demand.
Code Compliant DTV – Simplify By Plumbing For Compliance
As a component of their normal operation, commercial equipment such as dishwashers, combi ovens, and steam humidifiers discharge superheated steam and water. This effluent needs to be tempered down before going to the drain and entering public sewers.
ThermOmegaTech® offers the drain tempering valve (DTV) to simplify this process and comply with drain temperature limitations of international plumbing codes.
See some FAQs about the DTV below.
FAQ #1: When should the DTV be used?
A DTV should be used in any application where drain effluent with temperatures exceeding 140°F must be cooled prior to entering a public sewer in accordance with plumbing codes.
Failure to comply with these temperature limitations may lead to failed inspections, fines, and damage to PVC piping or equipment.
FAQ #2: How does the DTV work?
The DTV is installed into the drain line so that the hot effluent passes over the thermostatic actuator to constantly monitor drain water temperature. When effluent temperatures rise above the valve’s set-point, the valve will automatically modulate open to allow cold water to flow into the drain, cooling the effluent.
Once the effluent’s temperature falls below the set-point, the DTV modulates closed, cutting off cold water flow to conserve water.
FAQ #3: Can the DTV handle steam?
Yes, the DTV can handle fluid temperatures up to 250°F.
FAQ #4: What sizes are available?
The DTV is offered in 1/2″, 3/4″, and 1″ sizes in both brass and stainless steel.
FAQ #5: How do I select a size?
Use our online DTV Flow Calculator! To view the calculator, click here.
Reliable and self-operating, the DTV ensures drain water temperatures comply with internationally mandated plumbing regulations.
For more information on the DTV, we invite you to visit our website or to contact our team of product experts.
CircuitSolver Competition: How Other Balancing Valves Measure Up
Design engineers have a few options to choose from when selecting a balancing valve to include in a domestic hot water system.
The differences between the valves are not always readily available, and the amount of information on the internet can be overwhelming to distill down on calls with engineers or contractors.
Check out our easy-to-understand charts below to see how the CircuitSolver® compares to other thermostatic balancing valves now on the market:
ThermOmegaTech CircuitSolver®
Caleffi ThermoSetter®
Acorn TZV
TempFlow®
Bell & Gossett Temp Setter™
Manufacture Location [1]
USA
Italy
???
???
NSF 61 Certified [2]
Yes
Yes
No
Yes
Material of Valve
Stainless Steel
Brass
Brass
Stainless Steel Internals
Years of Install
Nine
One
One
One
Optional Temperature Gauge
Yes
Yes
Yes
No
Field Adjustable
No
Yes
Yes
Yes
Factory Set
Yes
Yes
Yes
Yes
Tamper Proof [3]
Yes
No
No
No
Integrated Union Option [4]
Yes
No
No
No
Integrated Check Valve Option
Yes
Yes
Yes
No
Optional Ball Valves
Yes – 2
No
Yes – 3
No
Optional ProPress Ends
Yes
No
No
No
Optional Strainer
Yes
No
No
No
Maximum Working Pressure
200 PSI
230 PSI
150 PSI
145 PSI
Maximum Allowable Temperature
250°F
195°F
180°F
150°F
Available Sizes [5]
1/2″, 3/4″, 1″, 1 1/4″, 1 1/2″, 2″
1/2″ & 3/4″
1/2″
1/2″ & 3/4″
Notes:
[1] CircuitSolver® meets the requirements of the “Buy America” and “Buy American” Acts.
[2] All but one state in the USA, Hawaii, requires or recommends NSF 61 certification for all components of the domestic hot water system.( http://www.nsf.org/newsroom_pdf/water_asdwa_survey.pdf ) See pg. 5.
[3] The ability to maintain system design without unexpected adjustments being made to balancing valves.
[4] An integrated union allows for easy servicing.
[5] Frequently 1” balancing valves are used in higher flow applications and in return line back to the hot water heater.
Thermal Disinfection Options
High-temperature sanitary flushes are performed in domestic hot water recirculation systems to kill Legionella bacteria and prevent growth.
The CircuitSolver® Sanitary Flush Valve features a dual-actuator to automatically balance the DHWS, even during the disinfection process. A “low-temp” actuator balances the system during normal operation, and a second “high-temp” actuator allows for maximum flow during the high-temperature flush.
ThermOmegaTech CircuitSolver® Union Sanitary Flush
Caleffi ThermoSetter®
Acorn TZV
TempFlow®
Bell & Gossett Temp Setter™
Temperature Well
Yes
Yes
Yes
No
Field Adjustable
No
Yes
Yes
Yes
Thermal Disinfection
Add-On Option [1]
No
Yes
No
No
Manually Adjust for High Temperature Flush
No
No
Yes
Yes
Factory Set
Yes
Yes
Yes
Yes
Integrated Union
Yes
No
No
No
Integrated Check Valve Standard
Yes
No
Yes
No
Maximum Working Pressure
200 PSI
230 PSI
125 PSI
145 PSI
Maximum Temperature
250°F
195°F
180°F
150°F
Available Sizes [2]
½”, ¾”, & 1”
½” & ¾”
½”
½” & ¾”
Notes:
[1] Thermal disinfection option can be added to standard valve without purchase of separate thermal disinfection valve.
[2] Depending on flow rates for thermal disinfection, a larger valve may be preferred.
Should you have any questions about the above CircuitSolver competition comparison charts, please do not hesitate to contact our dedicated team of product experts.
Temperature is often a subjective experience – how cold is jacket weather, how hot is too hot for a shower, etc.
What is never subjective? Drain effluent temperature restrictions.
Drain water from commercial equipment exceeding the 140°F cut-off point can significantly impact a business’ operations due to failed inspections, fines, and damaged PVC piping.
To simplify compliance with international plumbing codes governing effluent flow, ThermOmegaTech offers the drain tempering valve (DTV). Compact and effective, the DTV is 100% self-operating and is incredibly easy to install on new or pre-existing commercial equipment set-ups.
The DTV is installed into the equipment’s drain line so the hot effluent flows over the valve’s thermal actuator, with a cold water supply on the valve’s inlet. While there, the DTV continuously monitors effluent temperatures.
When the effluent’s temperature reaches theDTV’s set-point, the valve will automatically open to mix in cold water and temper down the effluent into compliance range.
Once the effluent temperature has fallen to the DTV’s set-point, the valve will shut off the cold flow to conserve water.
Selecting a DTV
The DTV is offered in several sizes with differing flow rates. To streamline selecting the size best suited to your individual tempering application, use our online DTV Flow Calculator tool.
Don’t sweat the next inspector’s visit – choose the drain tempering valve for guaranteed effluent compliance with all international plumbing codes.
For more information on the DTV or our other plumbing products, we invite you to visit the CircuitSolver website for product sheets.
Should you have any questions, please do not hesitate to contact our team of product experts or your dedicated local representative.
As a component of their normal operation, commercial equipment such as dishwashers, combi ovens, and steam humidifiers discharge super heated steam and water. This effluent needs to be tempered down before going to drain and entering public sewers. ThermOmegaTech® offers the drain tempering valve (DTV) to simplify this process and comply with drain temperature limitations of international plumbing codes.
See some FAQs about the DTV below.
FAQ #1: When should the DTV be used?
A DTV should be used in any application where drain effluent with temperatures exceeding 140°F must be cooled prior to entering a public sewer in accordance with plumbing codes.
Failure to comply with these temperature limitations may lead to failed inspections, fines, and damage to PVC piping or equipment.
FAQ #2: How does the DTV work?
The DTV is installed into the drain line so that the hot effluent passes over the thermostatic actuator to constantly monitor drain water temperature. When effluent temperatures rise above the valve’s set-point, the valve will automatically modulate open to allow cold water to flow into the drain, cooling the effluent.
Once the effluent’s temperature falls below the set-point, the DTV modulates closed, cutting off cold water flow to conserve water.
FAQ #3: Can the DTV handle steam?
Yes, the DTV can handle fluid temperatures up to 250°F.
FAQ #4: What sizes are available?
The DTV is offered in 1/2″, 3/4″, and 1″ sizes in both brass and stainless steel.
FAQ #5: How do I select a size?
Use our online DTV Flow Calculator! To view the calculator, click here.
Reliable and self-operating, the DTV ensures drain water temperatures comply with internationally mandated plumbing regulations.
For more information on the DTV or these Drain Tempering Valve FAQs, we invite you to visit our website or to contact our team of product experts.
We frequently receive questions about DHWS design, CircuitSolver® applications, and our other plumbing products during calls with our representative agencies. Below are some of the most commonly asked questions:
Q1: Do you have to use CircuitSolver® with a variable speed recirculation pump?
A1: No, CircuitSolver®s may be installed in systems using standard fixed speed or variable speed recirculation pumps. However, some features of a variable speed pump, also known as a “smart” pump, can be an excellent match with CircuitSolver®s.
Q2: What happens during system start-up when using a fixed speed pump and CircuitSolver®?
A2: At startup, CircuitSolver® is fully open, therefore GPM is high and head loss is low, allowing the system to balance quickly. As water temperature rises to CircuitSolver® set-point the valve modulates “closed”, adding friction/heat loss and reducing the flow from the pump. As a result, the flow required to offset heat loss will be satisfied.
Q3: How do you size the recirculation pump in systems with CircuitSolver®?
A3: Pumps should be appropriately sized to offset total system heat loss, whether it is a fixed speed or variable speed pump. Systems should not be sized for start-up, they should be sized for normal operation of the recirculation system. The CircuitSolver® Design Guide can help you calculate flow, pressure loss, and the recirculation pump size of your system. The design guide is available on our website’s plumbing specs page here.
Q4: Can CircuitSolver® work in the same recirculation system as an aquastat?
A4: Yes, CircuitSolver® can function in systems with aquastats, however ASHRAE, ASPE, and OSHA strongly advise against turning off recirculation pumps with aquastats.
Q5: Do you have BIM and Revitt files on your website?
The ThermOmegaTech® STVM® Washdown Station utilizes a silent type venture mixing valve to combine steam and water together to produce a user-defined temperature. This ingeniously designed product is efficient, easy to maintain, and most importantly safe – a necessary addition to any facility that uses washdown stations.
Designed to have a quick startup time and an even shorter downtime, the STVM® features an interchangeable cartridge for ease of maintenance. Unlike other manufacturers’ washdown stations that require a specialized tool and the user to take the unit off the wall to perform regular maintenance, ThermOmegaTech® STVM® Washdown Station requires only a standard wrench and doesn’t need to be moved from its point of installation. Simply unscrew the cartridge from the top of the unit, put in a new cartridge, and the unit is up and running within moments.
As the STVM unit uses steam to heat water, personnel safety is a top priority. If the cold-water supply to the unit is interrupted the thermostatic mixing valve will sense the over-temperature flow and close off, preventing operation. The valve will remain closed until the cold water supply is restored, after which it will automatically open and re-establish flow, protecting both personnel and equipment.
Frequently Asked Questions about the STVM Washdown Station:
Q: What is the difference between a 150°F unit and a 185°F unit? A: These numbers indicate the unit’s over-temperature shutoff point, typically due to a sudden lack of a cold-water supply. Once the unit’s thermostatic actuator senses its set shut-off temperature (either 150°F or 185°F, depending on the model) the internal mixing valve will modulate closed and stop the flow. Only after the cold-water supply has been restored to the unit will the valve modulate open and re-establish flow. The unit’s over-temperature shutoff point is not field adjustable.
Q: How can we make the unit’s downtime for maintenance even shorter? A: Keep a spare cartridge on hand! Don’t wait for the STVM® Washdown Station to require maintenance to order a new cartridge as the lead time will result in the unit being out of service until the new cartridge is received. By keeping a spare cartridge on hand the station’s downtime is minimized, allowing personnel to get back to work sooner.
It is critical to have a washdown station in food processing, dairy, breweries, wineries, chemical, petrochemical, and pharmaceutical facilities to maintain a clean environment. Washdown stations are used to quickly and efficiently clean and sanitize equipment in place between production runs or shift changes.
ThermOmegaTech® offers three different washdown station options:
STVM® Steam & Water Station
The STVM® Washdown Station provides an effective high temperature wash in an easy-to-maintain package. Utilizing our patented Silent Venturi Mixing Valve (STVM®) technology, this washdown station mixes together steam and water to produce a high-powered wash at a user-defined temperature.
Designed to be self-scouring, the mixing valve prevents mineral buildup in tight spaces, decreasing maintenance frequency. To further reduce time spent on required regular maintenance, the unit is in-line serviceable. The user simply switches out the STVM® cartridge with another and the unit is back up and running in minutes.
Safety is our priority, so every STVM® Washdown Station has two built-in safety features – interlocking ball valves to prevent steam-only operation, and an automatic shut-off when output is 15°F over the unit’s temperature set-point (either 150°F or 185°F) or when cold water flow is interrupted.
HCX Water & Water Station
For facilities without an available steam supply, the HCX Station is an ideal solution. This unit utilizes individual globe valves to mix hot and cold water to a user-defined temperature, clearly displayed on the integrated temperature display gauge.
To prevent accidental scalding, the unit is offered with our unique SmartFlow feature. This in-line, over-temperature safety valve automatically stops flow should the unit’s output exceed a factory specified set-point.
HCS Single-Channel Station
The HCS Station simplifies washdown applications even further, providing a high-powered single stream of either cold water or pre-heated hot water at the turn of a ball valve. The unit employs an integrated temperature gauge to confirm output temperature.
Recognized in the commercial plumbing industry for our innovative line of CircuitSolver® thermostatic balancing valves, our dynamic paraffin wax actuator technology can be used in a wide range of applications for several markets. In addition to the CircuitSolver® line, ThermOmegaTech® plumbing product offerings also include the ESS Water Heater for tepid water delivery to emergency safety showers and face/eyewash stations.
Emergency safety fixtures are critical to employee safety in any workplace where hazardous chemicals are handled. For facilities without a ready supply of steam or hot water, the ESS Water Heater is a safe and reliable solution. Specifically designed to comply with ANSI Z358.1-2014 tepid water standards, this product combines a third-party electric water heater and ThermOmegaTech®’s Therm-O-Mix® Station Water/Water Mixing (WWM).
When an emergency safety station is activated, cold water from the facility and hot water from the heater enters the Therm-O-Mix® WWM which automatically proportions the two flows into OSHA-approved tepid water which is then delivered to the fixtures.
Unlike instantaneous heaters, the ESS Water Heater will be unaffected by a loss of power.
The industrial-grade water heater has a heavy-duty carbon steel tank with an internal cement lining and external foam insulation to minimize stand-by heat loss. The Therm-O-Mix® WWM functions completely mechanically with no need for a source of electricity. Even if the lights go out, the ESS Water Heater packaged system will continue to provide tepid water and ensure worker safety.
Should you have any questions about this product or application, please do not hesitate to contact our dedicated team of product experts.
Q&A with ThermOmegaTech® about new automatic DHWS balancing valve – CircuitSolver® Union Sanitary Flush
Being “first” often sets the bar high. As one of the first manufacturers of a thermostatic balancing valve for domestic hot water systems, The ThermOmegaTech® commitment has not just been to set the bar but also to raise the bar. Since the introduction of its CircuitSolver® in 2012, the company has frequently added components, including ball valves, strainers, check valves and ProPress ends to meet customer demand.
In April 2018, the innovation continued with the launch of the CircuitSolver® Union Sanitary Flush thermostatic balancing valve for domestic hot water systems. The union is integral with the valve body, which also has an optional integral check valve. A key feature of the CircuitSolver® Union Sanitary Flush is the new capability to automatically balance a domestic hot water system during a high-temperature sanitary flush procedure.
In the following Q&A with ThermOmegaTech®, Plumbing Engineer explores the features of the new product, including its ability to mitigate Legionella and other bacteriological problems.
PE: What makes CircuitSolver® Union Sanitary Flush different from other valves on the market?
TOT: It has all-stainless steel construction for maximum corrosion resistance and durability. It is NSF61 and NSF372 certified — even though it seems that all components in a domestic hot water system (DHWS) should be certified and most plumbing codes and specifications say they must be, not all balancing valves are certified. The valve is completely automatic, thermostatically balancing both the standard recirculation temperature as well as the high-temperature sanitary flush cycle. No power, signal, or powered actuators are required, as in some other such balancing valves.
ThermOmegaTech® design is highly resistant to mineral buildup and the adverse effects of debris in the piping system. It is the only tamper-proof thermostatic balancing valve on the market. Other competitive devices are adjustable for several reasons: those manufacturers don’t manufacture their own thermal actuators as ThermOmegaTech® does. They aren’t as flexible and offer all the setpoint variations we can, so their valve is adjustable, making it prone to tampering and/or being set to a temperature other than what the designer specified.
With this valve, the plumbing system designer specifies the desired temperature and the valves are factory-set to that exact setting.
PE: What are the benefits or special features of the CircuitSolver® Union Sanitary Flush that are specific to those designing and specifying thermostatic balancing valves for DHWS?
TOT: CircuitSolver® Union Sanitary Flush brings the benefits of the standard CircuitSolver® into high-temperature sanitary flush applications. There is no manual balancing required. It can simply be installed; once the system is turned on, within minutes the building’s DHWS is balanced. Unlike manual balancing valves or fixed-flow devices, CircuitSolver® Union Sanitary Flush will automatically go to full open when high-temperature water is being flushed, providing maximum flow for high-temperature sanitary flush.
New CircuitSolver® Union Assembly ProPress® combines CircuitSolver® balancing technology and Viega ProPress® ends.
ThermOmegaTech®, a world leader in the design and manufacture of self-actuating, thermostatic valve technology, adds the CircuitSolver® Union Assembly ProPress (CSUA-PP) to its distinguished line of products.
The CircuitSolver® is a domestic hot water system balancing valve that continuously and automatically adjusts the flow through each
branch of a water recirculation system to maintain the specified temperature at the end of each branch, regardless of fluctuations in demand. The CSUA-PP combines the CircuitSolver® technology professionals’ trust and Viega® ProPress ends for improved ease of installation.
Lauren Berenato, Commercial Plumbing Product Manager at ThermOmegaTech® says, “The CircuitSolver® product line is revolutionizing the plumbing industry by making domestic hot water system balancing automatic and continuous. The CSUA-PP’s Viega ProPress® ends makes it even easier for tradesmen to implement our technology into their systems, saving them time and labor costs.”
Each CSUA-PP incorporates Viega’s Smart Connect Technology. Identifiable by a small dot on each ProPress® end, it allows installers to easily identify un-pressed connections during installation. The CircuitSolver® Union Assembly ProPress is lead-free, resistant to corrosion, and all components are NSF 61 Certified. In addition, each and every CSUA-PP valve is leak tested prior to leaving the factory and comes equipped with long service life and a 3-year warranty.
To view the full article on Mechanical Hub click here.
ThermOmegaTech®, a world leader in the design and manufacture of self-actuating thermostatic valve technology, introduces the CircuitSolver® Sanitary Flush (CSUSF) Valve as the newest addition to their CircuitSolver® line. The CSUSF allows for higher-temperature water to flow through a domestic hot water system during the disinfection process to protect against Legionella growth in systems capable of high-temperature flushes.
Nick Tallos, Vice President of Engineering for ThermOmegaTech® says, “CircuitSolver® technology was already an innovative balancing method for domestic hot water systems. Now, with the addition of the Sanitary Flush, CircuitSolver® further stands out as a revolutionary technology with a myriad of applications. With its capability to protect against Legionella growth, the CircuitSolver® becomes an even easier and reliable balancing solution. It’s just another step in the right direction.”
The CircuitSolver® is a thermostatic, self-actuating balancing valve that continuously and automatically adjusts the flow through each branch of a domestic hot water recirculation system to maintain the specified temperature at the end of each branch, regardless of fluctuations in hot water demand.
It is a direct replacement for manual balancing valves and eliminates balancing labor and callbacks. The CSUSF valve uses two high-thrust actuators, a low-temperature actuator to maintain standard balancing temperature, and a high-temperature actuator to allow for high-temperature sanitary flushing of the system.
The CircuitSolver® Sanitary Flush Valve is tamper-proof and automatically balances any domestic hot water system at a set temperature, while still allowing higher water temperatures to enter for disinfection, preventing Legionella growth. It is the ideal solution for a maintenance-free balancing and high-temperature flush application. The CSUSF is lead-free, stainless steel, and corrosion-resistant. The CSUSF valve is NSF/ANSI 61 certified and comes equipped with long service life and a 3-year warranty.
The ThermOmegaTech® CircuitSolver® Sanitary Flush Valve is available for purchase through your local representative.
To view the full article on Mechanical Hub click here.
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The CircuitSolver® is a thermostatic, self-actuating balancing valve that continuously and automatically adjusts the flow through each branch of a domestic hot water recirculation system to maintain the specified temperature at the end of each branch, regardless of fluctuations in hot water demand.