This 1/4 MNPT safety valve is ASME coded and certified by the national board of boiler and pressure vessel inspectors. Valves are interchangeable with all other ASME valves of same size and pressure. This safety valve is bubble tight to 10% of set pop off pressure and resets after pressure drops 50%. Product Features:1/4 male national pipe threadPop off pressure of 70 pounds per square inchAir flow of 70 standard cubic feet per minute
