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Comparison : Item # CSU-CW-1/2-XXX, CircuitSolver® 1.8 Inch (in) Diameter (D) and 3.7 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System
Item # CSU-CW-1/2-XXX-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
Item # CSU-CW-3/4-XXX, CircuitSolver® 2.0 Inch (in) Diameter (D) and 4.3 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System
Item # CSU-CW-3/4-XXX-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
Item # CSU-CW-1-XXX, CircuitSolver® 2.5 Inch (in) Diameter (D) and 4.7 Inch (in) Length (L) Thermostatic Balancing Valve for Cold Water Recirculation System