Pentair 263056 FullFloXF 3-Way 2.5"x3" CPVC Valve Valves rated at 50 psi and an industry leading 180 GPM of flow Valve body made from CPVC for maximum heat resistance Check valve return spring designed to minimize head loss Check valve design seals down to 15%u201D water column (0.54 psi) Maintenance-free PTFE composite diverter seal