This 1?” Sch 80 CPVC Pneumatic Ball Valve, EPDM, Single Acting, (SOC x SOC) is a true union ball valve with a pneumatic actuator on top for automatic control when compressed air is applied. the penumatic actuator opens when compressed air is applied to it but closes due to internal springs. Socket connections are joined to pipe of the same diameter with solvent welding. CPVC is a higher temperature version of PVC and has better chemical resistances. EPDM seals provide effective sealing with resistances to several chemicals over a wide range of temperatures. We buy at the lowest prices so we can pass the savings onto you.