This 3″ Sch 80 PVC 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. Sch 80 PVC is robust and durable, perfect for commercial and industrial applications. 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.