This 1¼” Sch 80 CPVC Pneumatic Ball Valve, VITON, Single Acting, (SOC x FNPT) 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. One side connects to a pipe using solvent welding and the other has female threads. CPVC is a higher temperature version of PVC and has better chemical resistances. VITON seals provide increased temperature resistance than EPDM seals and recommended for exposure to oils, gasoline and aggressive chemicals. We buy at the lowest prices so we can pass the savings onto you.