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Cherne® 4 in. Clean-Seal® Plug
Features
- High-impact ABS threads for maximum durability
- Removable and field repairable inflation valve fitting
- Natural rubber body provides a leak-free seal
- Seals both plastic and hard to seal cast iron threaded cleanouts
- Plug design keeps work area and plumber dry no backsplash
- Clean-Seal® Plug holds back up to 13 PSI or 30 ft. of head pressure
- Easy to install
Manufacturer Resources
Product Specs
- Deflated Diameter:
- 4.5 in. (115 mm)
- Deflated Length:
- 8.5 in. (215 mm)
- Inflation Pressure:
- 35 psi (2,4 bar)
- Inflation Thread:
- 1/4 in.
- Maximum Back Pressure:
- 13 psi (0,9 bar)/30 ft. (9.1 M)
- Volume:
- 0.104
- Department:
- Plumbing
- Product Group:
- Plumbing Testing
- Product Subgroup:
- Testing Products
- Product Type:
- Test Plug
- Product Finish:
- Black
- Product Weight:
- 1.4
- Product Nominal Size:
- 4 in. (100 mm)
OATEY 271721 – Frequently Asked Questions
1) Will the Cherne Clean-Seal plug seal a 4 inch cast iron cleanout, or is it only for plastic?
Both. The Clean-Seal plug seals plastic and hard-to-seal cast iron threaded cleanouts, which is the case where a rigid test plug tends to leak because the old iron threads are pitted or out of round. The natural rubber body inflates against whatever shape the threads have left. Nominal size is 4 in. (100 mm).
2) How much head pressure can a 4 inch Cherne Clean-Seal test plug hold back?
13 psi (0,9 bar), which is 30 ft. (9.1 M) of water column. That is the number to check against your test stack height: a three story riser filled to the top of the third floor is right at the limit, and anything taller needs the plug set higher in the system or a plug rated above 30 feet of head.
3) What pressure do you inflate a Cherne 271721 test plug to?
35 psi (2,4 bar) is the inflation pressure for the 4 inch Clean-Seal plug. Note that is inflation pressure, not what it holds back, those are two different numbers: it inflates at 35 psi and resists up to 13 psi of back pressure. Run a gauge on the inflation line rather than guessing, since over-inflating a rubber plug in a cast iron cleanout is how they get destroyed.
4) What size hose or fitting connects to the inflation valve on a Cherne Clean-Seal plug?
The inflation thread is 1/4 in., so your existing 1/4 in. air line, gauge assembly, or hand pump chuck from other Cherne test balls will thread right on. The valve fitting itself is removable and field repairable, so a damaged valve does not scrap the plug.
5) What is the difference between a Clean-Seal plug and a plain inflatable test ball for a cleanout?
A test ball drops into the pipe and has to be held or fished back out, and when you deflate it the standing water comes back at you. The Clean-Seal design threads into the cleanout and is built so the work area and the plumber stay dry, no backsplash on release. For testing at a threaded cleanout that is the reason to pick it; for blocking a line mid-run where there are no threads to grab, a standard inflatable test ball is the right tool.
6) Is the Cherne Clean-Seal plug reusable, and what wears out first?
It is a reusable test plug. The threaded section is high-impact ABS and the sealing body is natural rubber, and the part most likely to give trouble first is the inflation valve fitting, which is removable and field repairable rather than a reason to replace the whole plug. Keep the rubber clean of grit before inflating in cast iron.
7) What part number do I order for the Cherne 4 inch Clean-Seal plug?
Oatey 271721 is the manufacturer part number for the Cherne 4 in. Clean-Seal plug. One size, one configuration, in black, so there is no handing, thread option, or finish to specify when you order. Weight is 1.4.
How fast can I get the OATEY 271721 delivered?
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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 271721 come with a warranty?
Absolutely. The OATEY 271721 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 271721?
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