PowerMate Vx 031-0020RP 3/4-Inch NPT O.D. by 3/4-Inch NPT I.D. with 1/8-Inch Bleeder Check Valve is a member of a large line of PowerMate genuine replacement parts. The PowerMate Vx 3/4-Inch NPT O.D. by 3/4-Inch NPT I.D. with 1/8-Inch Bleeder Check Valve prevents air from going into the compressor head from the tank. Replace the compressor check valve with a new PowerMate Vx 3/4-Inch NPT O.D. by 3/4-Inch NPT I.D. with 1/8-Inch Bleeder Check Valve if there is air leaking and the check valve fails to close off. PowerMate is one of the world's leading brands of portable and standby electric generators, air compressors, water pumps, air tools, pressure washers, and accessories.