Cherne ® 4" End-of-Pipe Gripper ® Plug, 17 PSI - 40 ft.

The Cherne 4" End-of-Pipe Gripper (part #270-245) is the most commonly used mechanical test plug for standard 4" DWV pipe testing. It seats at the pipe end and cannot fall in — rated for 17 PSI / 40 ft. head pressure. Fits 4" Schedule 40 and Schedule 80 PVC, ABS, and cast iron pipe (usage range 3.80"–4.06" ID). Unlike the Inside-of-Pipe Gripper, this end-of-pipe design seats flush at the opening — the right choice when you only have access from one end of the run. Glass-reinforced ABS body with natural rubber O-ring, wing nut expansion — no inflation, no gauge.

Key Features

• End-of-pipe design — seats at the pipe end and cannot fall in during testing
• 17 PSI / 40 ft. head pressure — meets code requirements for DWV and sewer air tests
• Mechanical wing nut expansion — no inflation needed, no gauge to carry
• Natural rubber O-ring — seals round and out-of-round pipes with excellent memory
• Zinc-plated hardware — carriage bolt and extra-large wing nut resist rust and corrosion

Technical Specifications

Applications

The go-to plug for 4" sewer line testing, DWV inspections, code-compliance air tests, stack testing, and cleanout testing. Standard equipment for plumbing contractors, municipal utility crews, and building inspectors working with 4" drain and sewer pipe.

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