Conrader Brass ASME Approved Safety Valve, 75 psi Set Pressure, 1/4" Male NPT 1/4" NPT ASME APPROVED BRASS SAFETY RELIEF VALVE BY CONRADER 39 SCFM - 75 PSI SET PRESSURE - NON ADJUSTABLE 1/4" MALE NPT - 1/4" NPT MEASURES 0.505" ON A TAPE MEASURE CERTIFIED AND STAMPED NB UV ASME MADE IN USA