WEATHER RELIEF CAP - 2-1/2"

You can drastically reduce your replacement costs with this simple but unique design. This product is designed to allow pressure relief of gas, steam or vapor & return to closed position with the spring-loaded cap. Weather caps help stop relief valve contamination. Plastigage weather caps operate on pressures of 21” W.C. through 300 lbs per square inch. 300 PSI applies up to 4” diameter only.