The Cherne 12" T-Handle Gripper with Bypass (part #272-973) is a heavy-duty aluminum mechanical test plug with 3/4" NPT male bypass for 12" underground sewer and storm pipe. Rated for 10 PSI / 23 ft. head pressure. Fits 12" concrete, clay, SDR 26, and SDR 35 pipe (usage range 11.7"–12.3" ID). The 16 lb aluminum construction and neoprene O-ring are designed for long-term underground service. Zinc-plated steel T-handle for high-torque expansion.

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
10 PSI / 23 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	272-973
Nominal Pipe Size	12"
Usage Range (Pipe ID)	11.7–12.3"
Bypass Size	3/4" NPT M
Max Back Pressure	10 PSI
Max Head Pressure	23 ft.
Body Material	Heavy-duty aluminum
Seal	Chemical-resistant neoprene O-ring
Handle	Zinc-plated steel T-handle
Body Length	9.7"
Weight	16 lbs
Pipe Compatibility	Concrete, clay, SDR 26, SDR 35

Applications

Municipal sewer testing on 12" mains, storm sewer isolation and flow control, bypass plugging during large-diameter line repairs, and construction acceptance testing. The 12" is the largest size that accepts SDR 26 and SDR 35 pipe — 15" and 18" models are limited to concrete and clay.

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 12" con mango en T y derivación de 3/4