Cherne 3" Iron Grip Bypass Plug, 11 PSI, ½" Bypass

The Cherne 3" Iron Grip Bypass Plug (part #268-038) is a cast iron mechanical test plug with 1/2" NPT bypass for 3" sewer and drain pipe testing. Rated for 11 PSI / 25 ft. head pressure. Fits 3" pipe (usage range 2.82"–3.12" ID). The 2.3 lb cast iron body at 12.75" long provides a robust, corrosion-resistant seal with natural rubber O-ring. Large wing nut design for easy, tool-free operation.

Key Features

• Cast iron construction — heavy-duty durability for repeated field use
• 1/2" NPT threaded bypass — controlled flow-through during testing
• 11 PSI / 25 ft. head pressure — rated for low-pressure water and air tests
• Natural rubber O-ring — seals round and out-of-round pipes
• Large wing nut design — easy, tool-free installation and superior sealing

Technical Specifications

Applications

Low-pressure water and air testing on 3" sewer lines, bypass plugging during repairs, temporary pipe blocking with controlled flow-through, and residential drain testing. The cast iron construction is ideal for repeated use in rough field conditions.

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