CPVC check valves are used in systems to prevent backflow into the system once the system has been turned off for repair or maintenance. The valves will come manufactured with a floating ball in it that will check up inside the valve once the flow is stopped in the system. The ball is made of CPVC material so that once the material passes through the valve it is not harmed. These valves range in size from ½” up to 4” and come with socket or threaded options. CPVC check valves are pressure tested at 150 PSI and will handle temperatures up to 200 degrees.