Cherne 10" Iron Grip Bypass Plug, 3.5 PSI, ½" Bypass

The Cherne 10" Iron Grip Bypass Plug (part #268-108) is a heavy-duty cast iron mechanical test plug with 1/2" NPT bypass for 10" sewer and storm pipe. Rated for 3.5 PSI / 8 ft. head pressure. Fits 10" pipe (usage range 9.8"–10.2" ID). At 23 lbs and 17" long, this is a two-person plug designed for large municipal pipe. Cast iron body with natural rubber O-ring seals round and out-of-round pipes.

Key Features

• Cast iron construction — heavy-duty durability for repeated field use
• 1/2" NPT threaded bypass — controlled flow-through during testing
• 3.5 PSI / 8 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 bypass plugging on 10" sewer mains, temporary blocking during major pipe repairs, and flow diversion on municipal storm systems. The 3.5 PSI max rating makes this a low-head application plug. For higher pressure at 10", consider the T-Handle Gripper with Bypass (10 PSI) or the I-Series Muni-Ball.

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