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Cherne® FIN SET 15 IN. SDR 35 5%
Features
- Nine-fin design ensures testing accuracy
- 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
- Lightweight, corrosion-resistant
- Field-verifiable without a proving ring
- Assembles without tools
- Open design allows gravel and debris pass-through
- All sizes fit through standard 24 in. manhole
Manufacturer Resources
Product Specs
- Astm:
- D3034
- Average Pipe I D :
- 14.374 in. (365.10 mm)
- Base Pipe I D :
- 13.897 in. (352.98 mm)
- Volume:
- 0.083
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Fittings
- Product Type:
- General Fittings
- Product Weight:
- 4
- Product Nominal Size:
- 15 in. (380 mm)
OATEY 285110 – Frequently Asked Questions
1) What pipe size and deflection does the Cherne 285110 fin set check?
It's a nine-fin set for a 15 in. (380 mm) nominal line, cut for SDR 35 pipe at 5 percent deflection. The fins are sized off an average pipe I.D. of 14.374 in. (365.10 mm), giving a base pipe I.D. of 13.897 in. (352.98 mm) at the 5 percent allowance. Use it only on 15 in. SDR 35; a different diameter or a different allowed deflection percentage needs its own fin set.
2) Which pipe standard is this 15 inch mandrel fin set cut for?
ASTM D3034, the standard for PVC sewer pipe and fittings in SDR dimensions. If the line on your job is a different spec with a different inside diameter, the fin geometry won't correspond and the test result won't mean anything.
3) Is the Oatey 285110 a complete mandrel or just the fins?
It is the fin set, part number 285110, the nine fins that make up the 15 in. SDR 35 5 percent gauge. Fins are the wear and size-specific component: crews stock a body and buy fin sets per pipe size and deflection spec rather than a separate complete mandrel for every line.
4) Do I need a proving ring to verify a Cherne nine-fin mandrel?
No. The nine-fin design is field-verifiable without a proving ring, so an inspector can confirm the gauge on site. That matters where a municipality witnesses the deflection test before accepting the line.
5) Will a 15 inch deflection mandrel tip or ride up inside the pipe?
On the 4 in. through 15 in. gauges the fin skid size equals the nominal pipe size, so the mandrel stays centered and won't tip in the line. That's what keeps a pull from reading a false obstruction.
6) Can one person handle this and get it down a manhole?
Yes. The fin set weighs 4 lb, is corrosion resistant, and all sizes in the line fit through a standard 24 in. manhole opening. It also assembles without tools, so there is nothing to carry down but the parts.
7) Will gravel or debris left in the sewer line jam this mandrel?
The fin layout is open, so gravel and debris pass through rather than packing in front of the gauge. You still want the line flushed, but a little residual grit won't stop the pull and give you a false deflection failure.
How fast can I get the OATEY 285110 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 285110 come with a warranty?
Absolutely. The OATEY 285110 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 285110?
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installation tips, and troubleshooting. Contact Us
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