Gas Air Compressor unloader valve pilot check valve combination 140-175 ALL IN ONE VALVE 1/2" FPT INLET X 1/2" FPT OUTLET 18 SCFM 1/2" FPT TOP Inlet x 1/2" Female Pipe Thread outlet - 18 scfm - w/ hand unloader 140-175 psi - (check out our throttle control cables for gas compressor listings) Free Shipping