The Cherne 8" End-of-Pipe Gripper (part #270-270) is the largest mechanical End-of-Pipe Gripper in the Cherne line — built for 8" sewer and storm drain testing. Rated for 17 PSI / 40 ft. head pressure. Fits 8" Schedule 40 and Schedule 80 PVC, ABS, and cast iron pipe (usage range 7.70"–8.03" ID). At 2.60 lbs with a 3-3/4" body length, it’s a substantial plug for large-bore applications. Glass-reinforced ABS body with natural rubber O-ring — wing nut expansion, no inflation or gauge required.

Key Features

End-of-pipe design — seats at the pipe end and cannot fall in during testing
17 PSI / 40 ft. head pressure — meets code requirements for DWV and sewer air tests
Mechanical wing nut expansion — no inflation needed, no gauge to carry
Natural rubber O-ring — seals round and out-of-round pipes with excellent memory
Zinc-plated hardware — carriage bolt and extra-large wing nut resist rust and corrosion

Technical Specifications

Cherne Part Number	270-270
Nominal Pipe Size	8"
Usage Range (Pipe ID)	7.70–8.03"
Max Back Pressure	17 PSI
Max Head Pressure	40 ft.
Body Material	Glass-reinforced ABS plastic
Seal	Natural rubber O-ring
Hardware	Zinc-plated carriage bolt, extra-large zinc wing nut
Operating Temperature	0°F to 125°F
Length	3-3/4"
Weight	2.60 lbs
Pipe Compatibility	Schedule 40 & 80 PVC, ABS, cast iron (no-hub, service weight, extra-heavy)

Applications

Municipal sewer testing on 8" mains, storm drain isolation, large-diameter DWV inspections, and temporary blockage for pipe repair or replacement. For pipe larger than 8", consider the Cherne T-Handle Gripper with Bypass (available in 6"–18" sizes).

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.

Cherne® 8" Gripper® Plug, 17 PSI - 40 ft.