Milton S-1090-200 1/4" MNPT ASME Safety Valve - 200 PSI Pop off Pressure 1/4" male national pipe threads Bubble tight to 10% of pop off pressure Pop off pressure of 200 pounds per square inch 170 cubic feet per minute Made in USA Milton is your number 1 source for Quality Air Accessories Since 1943 Milton has been producing Quality Air Accessories Milton covers automotive, industrial, hardware, agriculture, heavy-duty fleet and MRO markets