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Cherne® 8" Inside of Pipe Gripper® Plug
Features
- Natural rubber O-ring for excellent expansion and memory
- Zinc-Plated carriage bolt resists rust and corrosion
- Plug is rated for 17 PSI or 40 ft. of head pressure
- Extra large zinc wing nut for ease of tightening, no wrench required
- ABS glass-reinforced plates for added strength
Manufacturer Resources
Product Specs
- Maximum Back Pressure:
- 17 psi (1,2 bar)/40 ft (12 M)
- Volume:
- 0.159
- Department:
- Plumbing
- Product Group:
- Plumbing Testing
- Product Subgroup:
- Testing Products
- Product Type:
- Test Plug
- Product Finish:
- Yellow
- Product Material:
- Metal
- Product Weight:
- 2.45
- Product Nominal Size:
- 8 in. (200 mm)
OATEY 270288 – Frequently Asked Questions
1) What pipe size does the Cherne 8 inch Inside of Pipe Gripper plug fit?
The Cherne Gripper plug, Oatey model 270288, is a nominal 8 inch (200 mm) plug that seats inside the pipe rather than over the end. It expands against the inside wall of the pipe, so you need 8 inch pipe with a clean, reasonably round inside surface for the O-ring to seal against.
2) How much pressure will the Cherne 8 inch Gripper test plug hold?
Rated to 17 psi (1.2 bar), which works out to 40 feet (12 M) of head. That covers a typical multi-story DWV column test, but if your head height exceeds 40 feet you are over the rating and need a plug built for higher back pressure.
3) Do I need a wrench to set this Oatey Cherne plug?
No tools needed. The 270288 uses an extra large zinc wing nut you tighten by hand, which compresses the plates and expands the natural rubber O-ring against the pipe wall. Handy when you are working off a ladder or reaching into a riser.
4) Is this Cherne Gripper plug reusable on repeat DWV tests?
It is built for repeat use. The sealing element is natural rubber chosen for expansion and memory, so it returns to shape after each test, the carriage bolt is zinc plated against rust and corrosion, and the compression plates are ABS glass reinforced for strength. Rinse it and it goes back in the truck for the next job.
5) What is the difference between an inside-of-pipe test plug and an end-of-pipe plug?
An inside-of-pipe plug like the Cherne 270288 drops down into the bore and expands outward against the pipe wall, so it works where the pipe end is flush with a floor or cut off inside a fitting and there is nothing to grip on the outside. An end-of-pipe or over-the-end plug clamps around the outside of the stub, which needs exposed pipe sticking out. For an 8 inch riser or cleanout opening with no exposed stub, the inside style is the one you want.
6) How heavy is the Oatey 270288 8 inch test plug to handle on site?
It weighs 2.45, light enough for one hand to set and tighten. The body is metal hardware with glass-reinforced ABS plates, so it holds up in a gang box without bending.
How fast can I get the OATEY 270288 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the OATEY 270288 come with a warranty?
Absolutely. The OATEY 270288 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the OATEY 270288?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the OATEY 270288 from ZenSupply?
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and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.