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

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.

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — we ship within the USA and welcome tax-exempt purchasing for qualified accounts.