Brand new continuous run air compressor piloted discharge check valve. This valve features a 3/4" Compression inlet x 3/4" NPT Male thread outlet. This is a combination valve that includes a pilot valve, pressure discharge valve, and a check valve all in one piece. Using this valve will make it possible to have a constantly running air compressor with either a gas or electric motor. The valve will relieve the pressure that the compressor is pumping into the atmosphere through a silencer. This will let your compressor continue to run without building pressure. Specifications: -Material: Machined Brass -USA MADE -3/4" NPT Male Pipe Thread Outlet To Tank -3/4" Compression Thread Inlet For 3/4" Copper Tubing -1/8" NPT Female Pipe Thread Port For Throttle Control -Factory Set At 145 Psi Cut In & 175 Psi Cut Out Pressure -Pressure Can Be Adjusted 30-40 Psi Up or Down -30 CFM Rating -Equipped With A Manual Unloader Flip Valve At The Top Of The Unloader