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Cherne® Fin Set 8 In. Sdr 35 5%
Features
- Assembles without tools
- All sizes fit through standard 24 in. manhole
- Lightweight, corrosion-resistant
- Nine-fin design ensures testing accuracy
- 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
- Open design allows gravel and debris pass-through
Manufacturer Resources
Product Specs
- Astm:
- D3034
- Average Pipe I D :
- 7.891 in. (200.43 mm)
- Base Pipe I D :
- 7.665 in. (194.69 mm)
- Volume:
- 0.019
- Department:
- Plumbing
- Product Group:
- Plumbing
- Product Subgroup:
- Fittings
- Product Type:
- General Fittings
- Product Weight:
- 6
- Product Nominal Size:
- 8 in. (200 mm)
OATEY 285080 – Frequently Asked Questions
1) Do I need a proving ring to use this mandrel?
No. The Cherne fin set is field-verifiable without a proving ring, so the inspector can confirm the gauge on site. The nine-fin design is what holds the measurement accurate through the pull.
2) Will this mandrel pass code inspection on a municipal sewer job?
The fins on 4 in. through 15 in. gauges have a skid size equal to the nominal pipe size, which is what lets the gauge meet regional codes and keeps it from tipping in the line. The 8 in. unit is cut to the 5 percent deflection limit most agencies specify for SDR 35 PVC gravity sewer. Confirm the deflection percentage your jurisdiction requires, since some call for a different figure.
3) Will an 8 inch deflection mandrel fit down a standard manhole?
Yes. Every size in the Cherne fin set line, including the 8 in., passes through a standard 24 in. manhole, so you can lower it into the line and assemble it in the field. It also goes together without tools.
4) What happens if there is gravel or debris in the line during the mandrel pull?
The open fin design lets gravel and debris pass through rather than wedging the gauge, so a little grit in the invert will not give you a false failure. Corrosion-resistant and light enough to handle solo at about 6 lb.
5) Is the Cherne 285080 the right part number for an 8 inch 5 percent deflection test?
Yes. Order Oatey/Cherne model 285080 for the 8 in. SDR 35, 5 percent deflection fin set. The part is sold as a complete gauge assembly for that one size and deflection rating, so a different pipe diameter or a different percentage is a separate model.
How fast can I get the OATEY 285080 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 285080 come with a warranty?
Absolutely. The OATEY 285080 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 285080?
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
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