The Cherne 8" Iron Grip Bypass Plug (part #268-088) is a heavy-duty cast iron mechanical test plug with 1/2" NPT bypass for 8" sewer and storm pipe. Rated for 4.3 PSI / 10 ft. head pressure. Fits 8" pipe (usage range 7.72"–8.2" ID). At 11.5 lbs and 17" long, this is a substantial plug built for municipal and industrial applications. Cast iron body with natural rubber O-ring and large wing nut.

Key Features

• Cast iron construction — heavy-duty durability for repeated field use
• 1/2" NPT threaded bypass — controlled flow-through during testing
• 4.3 PSI / 10 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 8" sewer mains, temporary blocking during municipal pipe repairs, and flow control on storm drains. At 4.3 PSI max back pressure, the Iron Grip is designed for low-head applications. For higher pressure requirements at 8", use the T-Handle Gripper with Bypass (17 PSI).

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — same-day shipping on in-stock items, tax-exempt purchasing for qualified accounts.