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Cherne® FIN SET 4 IN. SDR 35 5%
Features
- Assembles without tools
- All sizes fit through standard 24 in. manhole
- Field-verifiable without a proving ring
- Fins for 4 in.-15 in. gauges have skid size equal to th nominal pipe size-gauge will meet regional codes and will not tip in the line
- Nine-fin design ensures testing accuracy
- Lightweight, corrosion-resistant
- Open design allows gravel and debris pass-through
Manufacturer Resources
Product Specs
- Astm:
- D3034
- Average Pipe I D :
- Consult Factory
- Volume:
- 0.017
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Fittings
- Product Type:
- General Fittings
- Product Weight:
- 3
- Product Nominal Size:
- 4 in. (100 mm)
OATEY 285056 – Frequently Asked Questions
1) Do I need a proving ring to use a Cherne mandrel fin set?
No. The Cherne fin set is field-verifiable without a proving ring, so the inspector can confirm the gauge on site rather than hauling a certified ring to the job. That is the main practical difference from older mandrel setups.
2) Will a mandrel gauge tip or ride up in the pipe and give a false pass?
The fins on the 4 in. through 15 in. gauges have a skid size equal to the nominal pipe size, which keeps the gauge from tipping in the line, and the nine-fin design is what holds it concentric for an accurate reading. Gauges built this way meet regional code requirements for deflection testing.
3) Will a 4 inch mandrel gauge fit down a standard manhole?
Yes. Every size in the Cherne fin set line, including the 4 inch, passes through a standard 24 in. manhole, so you can lower it in and pull it through the run without removing structures.
4) Does the Cherne 285056 need assembly tools or a wrench?
No tools. The fin set assembles by hand, so a single crew member can put it together at the manhole. It weighs 3 pounds, which is light enough to carry and pull by rope through a 4 inch run.
5) What happens if there is gravel or debris left in the sewer line during a mandrel pull?
The fin set uses an open design that lets gravel and debris pass through instead of packing up in front of the gauge and jamming it. You still get a true deflection reading rather than a false failure from trapped material. The body is corrosion-resistant, so wet, gritty line conditions won't eat it.
How fast can I get the OATEY 285056 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 285056 come with a warranty?
Absolutely. The OATEY 285056 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 285056?
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 285056 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.