Available With Plastic or Aluminum Covers
Plastigage weather caps have universal relief valve application. They are constructed of sturdy aluminum bases and tough, durable plastic covers. All weather caps have excellent weathering characteristics and long operating life.
No Blowoff, Breakage or Replacement
You can drasticly reduce your replacement costs with this simple but unique design. Special cover opens when pressure builds up, and returns to normal position when pressure subsides. 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.