MASTERS 83759 4IN P.R. PNEUMATIC TEST BALL PLUG. Internal Pressure relief device releases pressure when plug exceeds maximum pressure levels. Pressure relief has no moving parts to fail or malfunction.
Test-Tite 83588 Pressure Relief Pneumatic Test Plug 4″
Type: Pneumatic Test Plug. Item: Test Plug. Test Plug Weight: 11 lb. For Use In: DWV Plumbing Systems and Seal for Pipe. Plug Seal Material: Natural Rubber. Contains Pressure Release Valve: Yes. Maximum Back Pressure (Water): 30 ft of head.
Test-Tite 83588 Pressure Relief Pneumatic Test Plug 4″
& Recepticles. Electrical Outlets. Light Industrial. and Enclosures. Electrical Boxes. General Purpose. & Industrial.