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

Technical Specifications

Cherne Part Number	272-957
Nominal Pipe Size	8"
Usage Range (Pipe ID)	7.7–8.3"
Bypass Size	3/4" NPT M
Max Back Pressure	17 PSI
Max Head Pressure	40 ft.
Body Material	Heavy-duty aluminum
Seal	Chemical-resistant neoprene O-ring
Handle	Zinc-plated steel T-handle
Body Length	9.7"
Weight	12.9 lbs
Pipe Compatibility	Concrete, clay, SDR 26, SDR 35

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 — same-day shipping on in-stock items, tax-exempt purchasing for qualified accounts.

Tapón Cherne® de 8" con mango en T y derivación de 3/4