- Used for testing pipelines or to temporarily stop their flow
- Sizes range from 1-1/2" to 4"
- Works in place of other âstandardâ pneumatic plugs
- Pressure relief automatically resets for each inflation
- Pressure relief has no moving parts to fail or malfunction
- One-piece rubber portion is molded with no seams or bonded parts
- Multiple sealing ribs are located in the center portion of the plug for positive sealing
- Pressure relief valve releases excess pressure into the atmosphere
â¢Ring tag is attached to nylon core for extra rigidity