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Cherne® 3" Hub-Fit Gripper® Plug
Features
- Easy to install extra large zinc wing nut that won't rust
- Galvanized carriage bolt to prevent corrosion
- Made with glass-reinforced ABS plastic and natural rubber O-ring
- Yellow color enhances visibility in pipe
- Pressure rated for conducting DWV tests
Manufacturer Resources
Product Specs
- Maximum Back Pressure:
- 13 psi (0,9 bar)/30 ft. (9 M)
- Volume:
- 0.027
- Department:
- Plumbing
- Product Group:
- Plumbing Testing
- Product Subgroup:
- Testing Products
- Product Type:
- Test Plug
- Product Finish:
- Yellow
- Product Material:
- Metal
- Product Weight:
- 0.63
- Product Nominal Size:
- 3 in. (75 mm)
OATEY 270538 – Frequently Asked Questions
1) Will the Cherne 3 inch Hub-Fit Gripper plug seal inside a 3 inch cast iron hub, or is it for the pipe ID?
The Cherne Hub-Fit Gripper is sized for 3 inch (75 mm) nominal pipe and is the hub-fit style, meaning it seats in the hub of the fitting rather than being pushed down the barrel of the pipe. Tighten the wing nut to expand the rubber O-ring against the hub wall. If you need to plug the open end of a pipe run instead, you want a standard pipe-ID test plug in the same 3 inch size, not the hub-fit version.
2) How much head of water can a Cherne 270538 test plug hold for a DWV test?
It is rated to 13 psi (0.9 bar), which works out to 30 feet (9 m) of water column. That covers a typical three-story stack test. Do not use it past that head, and never use it for air or gas pressure testing above its DWV rating.
3) Is the Cherne Hub-Fit Gripper plug reusable, or is it a one-time test plug?
It is a mechanical, reusable plug. The body is glass-reinforced ABS with a natural rubber O-ring, the carriage bolt is galvanized and the wing nut is zinc, so the hardware resists rust between uses. Back the wing nut off, pull it, and it goes on the next opening. Inspect the O-ring for nicks before each test.
4) Do I need tools to install the Cherne 270538 gripper plug?
No wrench required. The extra large zinc wing nut is turned by hand to expand the seal, which is the point of the design when you are working down in a trench or reaching into a stub-out. Snug it until the plug grips; over-torquing by hand is unlikely but will distort the O-ring.
5) Why is this test plug yellow?
The yellow body is for visibility. Once a plug is down inside a 3 inch line it is easy to forget, and inspectors and plumbers both look for the color before the system is closed up. That matters on multi-family and commercial jobs where several openings get plugged at once and every one has to come back out.
How fast can I get the OATEY 270538 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 270538 come with a warranty?
Absolutely. The OATEY 270538 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 270538?
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 270538 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.