Cherne® 8" T-Handle Gripper® Plug with 3/4" Bypass

The Cherne 8" T-Handle Gripper with Bypass (part #272-957) is a heavy-duty aluminum mechanical test plug with 3/4" NPT male bypass for sewer and storm pipe testing. Rated for 17 PSI / 40 ft. head pressure. Fits 8" concrete, clay, SDR 26, and SDR 35 pipe (usage range 7.7"–8.3" ID). The 12.9 lb plug uses a chemical-resistant neoprene O-ring and zinc-plated steel T-handle for reliable expansion in underground applications. The 3/4" bypass allows controlled flow during testing.

Key Features

• T-handle mechanical expansion — high-torque sealing for concrete, clay, and SDR pipe
• 3/4" NPT M threaded bypass — controlled flow during testing without full shutoff
• 17 PSI / 40 ft. head pressure — rated for sewer air pressure tests
• Chemical-resistant neoprene O-ring — handles sewer gas and chemical exposure
• Heavy-duty aluminum body — corrosion-resistant and lighter than cast iron

Applications

Municipal sewer testing on 8" mains, storm drain air pressure tests, bypass plugging during line repairs, and long-term isolation applications. The 3/4" bypass nipple maintains controlled flow while the plug holds back-pressure — critical for testing active sewer lines without full shutoff.

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.