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The CircuitSolver® Union is equipped with an integrated union and optional check valve to reduce the number of system components being installed. It features an integrated o-ring for a leak-free seal.
CircuitSolver® Union (CSU) Optional Check Valves
Unit of Measure
1 2 3 4 

Item #

Item Name

Line Size

Closing Temperature

Valve Options

End Options

CSU-1/2-130-Blank-PP-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 130 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 130 ºF54.4 ºC N/A Standard N/A ProPress® Ends
CSU-1/2-130-Blank-PP-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 130 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 130 ºF54.4 ºC N/A Standard N/A ProPress® Ends
CSU-1/2-130-CV1-Blank-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 130 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 130 ºF54.4 ºC N/A Check Valve N/A Standard
CSU-1/2-130-CV1-Blank-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 130 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 130 ºF54.4 ºC N/A Check Valve N/A Standard
CSU-1/2-130-CV1-PP-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 130 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 130 ºF54.4 ºC N/A Check Valve N/A ProPress® Ends
CSU-1/2-130-CV1-PP-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 130 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 130 ºF54.4 ºC N/A Check Valve N/A ProPress® Ends
CSU-1/2-135-Blank-Blank-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Standard N/A Standard
CSU-1/2-135-Blank-Blank-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Standard N/A Standard
CSU-1/2-135-Blank-PP-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Standard N/A ProPress® Ends
CSU-1/2-135-Blank-PP-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Standard N/A ProPress® Ends
CSU-1/2-135-CV1-Blank-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Check Valve N/A Standard
CSU-1/2-135-CV1-Blank-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Check Valve N/A Standard
CSU-1/2-135-CV1-PP-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Check Valve N/A ProPress® Ends
CSU-1/2-135-CV1-PP-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 135 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 135 ºF57.2 ºC N/A Check Valve N/A ProPress® Ends
CSU-1/2-140-Blank-Blank-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Standard N/A Standard
CSU-1/2-140-Blank-Blank-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Standard N/A Standard
CSU-1/2-140-Blank-PP-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Standard N/A ProPress® Ends
CSU-1/2-140-Blank-PP-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Standard N/A ProPress® Ends
CSU-1/2-140-CV1-Blank-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Check Valve N/A Standard
CSU-1/2-140-CV1-Blank-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Check Valve N/A Standard
CSU-1/2-140-CV1-PP-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Check Valve N/A ProPress® Ends
CSU-1/2-140-CV1-PP-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 140 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 140 ºF60.0 ºC N/A Check Valve N/A ProPress® Ends
CSU-1/2-150-Blank-Blank-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 150 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 150 ºF65.5 ºC N/A Standard N/A Standard
CSU-1/2-150-Blank-Blank-TW N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 150 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 150 ºF65.5 ºC N/A Standard N/A Standard
CSU-1/2-150-Blank-PP-Blank N/A CircuitSolver® Union (CSU) 1/2 Inch (in) Line Size and 150 Degree Fahrenheit (ºF) Closing Temperature Optional Check Valve N/A 1/2 in N/A 150 ºF65.5 ºC N/A Standard N/A ProPress® Ends
Unit of Measure
1 2 3 4