Made in USA!! NG1 95 - 125 Unloader valve (continuous run unloader) for gas & electric powered air compressors 95-125 factory setting. Pressure can be adjusted 30-40 psi up or down 1/2" Female Pipe Thread Inlet x 1/2" Female Pipe Thread outlet. Includes complete with hand unloader and muffler/silencer. 30 scfm Rating Continuous Run Air Compressor Piloted Discharge Check Valve 1/2" Female NPT Inlet x 1/2" Female NPT Pipe Thread Outlet This piloted discharge check valve is a combination of a pilot valve, a pressure discharge valve, and check valve in one complete piece to make a constant run air compressor with gas engine or electric motor. This valve will relieve the pressure the compressor is pumping out to the atmosphere through a silencer so the compressor can stay running without building pressure. -Material: Machined Brass -USA MADE -1/2" Female NPT Pipe Thread Outlet To Tank -1/2" Female NPT Thread Inlet -1/8" NPT Female Pipe Thread Port For Throttle Control -Factory Set At 95 PSI Cut In & 125 PSICut 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 Piloted discharge check valves combine a pilot valve, a discharge valve, and a check valve into one system used to run an air compressor at a constant speed. They are used on both gas engine and electric motor compressors.