This 3″ Sch 80 CPVC Pneumatic Ball Valve, EPDM, Double Acting, (FNPT x FNPT) is a true union ball valve with a pneumatic actuator on top for automatic control when compressed air is applied. the pneumatic actuator opens and closes when compressed air is applied to the respective ports. a male adaptor, threaded pipe or pipe nipple connects to this part. 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. Our prices are a fraction of what you pay at your local plumbing store, order from Petram PVC Supply for quick shipping.