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To balance a cold water recirculation system, a CircuitSolver® Union Cold Water thermostatic valve is installed at the end of each branch or riser. The valve automatically monitors and modulates flow based on current water temperatures to maintain a set temperature in the system to mitigate Legionella growth.

The CircuitSolver® Union Cold Water balancing valve uses the same reliable and precise thermal actuator technology as the traditional CircuitSolver® for hot water balancing. Designed with ease in mind, the CSU-CW is offered in sizes ranging 1/2" to 1" and is available in a range of configurations to suit individual system needs.
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CSU-CW-11-70-CV1

CircuitSolver® 1.8 Inch (in) Diameter (D) and 3.7 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System
CSU-CW-11-70-CV1

CircuitSolver® 1.8 Inch (in) Diameter (D) and 3.7 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System with Optional Check Valve
CSU-CW-11-70-CV1

CircuitSolver® 2.0 Inch (in) Diameter (D) and 4.3 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System
CSU-CW-11-70-CV1

CircuitSolver® 2.0 Inch (in) Diameter (D) and 4.3 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System with Optional Check Valve
CSU-CW-11-70-CV1

CircuitSolver® 2.5 Inch (in) Diameter (D) and 4.7 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System
Description N/A To balance a cold water recirculation system, a CircuitSolver® Union Cold Water thermostatic valve is installed at the end of each branch or riser. The valve automatically monitors and modulates flow based on current water temperatures to maintain a set temperature in the system to mitigate Legionella growth.

The CircuitSolver® Union Cold Water balancing valve uses the same reliable and precise thermal actuator technology as the traditional CircuitSolver® for hot water balancing. Designed with ease in mind, the CSU-CW is offered in sizes ranging 1/2" to 1" and is available in a range of configurations to suit individual system needs.
Applications N/A Cold Water Recirculation Systems
Benefits N/A
  • Automatically and continuously adjusts to balance cold water recirculation systems
  • Reliable, long lasting thermal actuator
  • Long service life and 3 year warranty
Brands N/A ThermOmegaTech®
Certifications N/A American National Standards Institute (ANSI 61) National Sanitation Foundation (NSF 61)
Close Flow Coefficient (Cv) N/A 0.3
Design Features N/A
  • Never fully closes, small bypass of flow
  • Lead free for use in potable water systems
  • Stainless steel, corrosion-resistant construction
Design Flow Coefficient (Cv) N/A 0.65 N/A 0.65 N/A 0.85 N/A 0.85 N/A 1.50
Diameter (D) N/A 1.8 in46 mm N/A 1.8 in46 mm N/A 2.0 in51 mm N/A 2.0 in51 mm N/A 2.5 in64 mm
Length (L) N/A 3.7 in94 mm N/A 3.7 in94 mm N/A 4.3 in110 mm N/A 4.3 in110 mm N/A 4.7 in120 mm
Maximum Pressure N/A 200 psig14 bar
Maximum Temperature N/A 250 ºF121 ºC
Model N/A CircuitSolver®
Need for Dynamic Balancg N/A To discourage Legionella bacteria growth, cold water systems need to be recirculated and must be properly balanced to both establish continuous flow and keep line temperatures below 67ºF - the point at which Legionella begins to colonize.

Many vari
Open Flow Coefficient (Cv) N/A 1 N/A 1 N/A 1.4 N/A 1.4 N/A 2.7
Openg Temperature N/A XXX refers to the desired opening temperature. When the water temperature rises above this point the CircuitSolver® will begin to open, allowing water to easily enter the return line. For example, if you want 65ºF desired return temperature and the CSU-CW
Options N/A N/A Check Valve Insert N/A N/A Check Valve Insert N/A
Thread Size N/A 1/2 in N/A 1/2 in N/A 3/4 in N/A 3/4 in N/A 1 in
Thread Type N/A National Pipe Thread (NPT)
Warranty N/A 3 years
Weight N/A 1.2 lb0.5 kg N/A 1.2 lb0.5 kg N/A 1.9 lb0.9 kg N/A 1.9 lb0.9 kg N/A 3.1 lb1.4 kg
Why Cold Water Recirculation? N/A
  • Keeps cold water moving and maintains water quality to reduce the impact of stagnation
  • Ensures "residual chlorine" is distributed throughout the cold water system
  • Keeps water temperature in branches and risers below 68ºF
  • VH
Additional formation N/A Dynamically & automatically balance cold water recirculation systems using the CircuitSolver® Union Cold Water (CSU-CW) thermostatic balancing valve.

Legionella in Non-Recirculated Cold Water Systems

Stagnant, warm water in a plumbing system