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Cherne® 4-in. Long Test-Ball® Plug
Features
- Ring and chain assembly help prevent the plug from being drawn into the DWV plumbing system during testing
- Long Test-Ball® Plugs are designed for waste stack testing
- Includes a 3 ft extension hose
- Makes sealing wye fittings easy when performing tests on DWV systems
- Compatible with PVC pipes
- Natural-rubber construction provides an excellent seal
- Withstands up to 13 psi or 30 ft of head pressure
Manufacturer Resources
Product Specs
- Chain Eye Bolts:
- Ring and Chain
- Deflated Diameter:
- 2.5 in.
- Deflated Length:
- 24.75 in.
- Inflation Pressure:
- 30 psi (2,1 bar)
- Inflation Thread:
- tank valve
- Maximum Back Pressure:
- 13 psi (0,9 bar)/30 ft. (9,1 M)
- Volume:
- 0.253
- Department:
- Plumbing
- Product Group:
- Plumbing Testing
- Product Subgroup:
- Testing Products
- Product Type:
- Test Plug
- Product Finish:
- Black
- Product Weight:
- 2.74
- Product Nominal Size:
- 4 in. (100 mm)
OATEY 271047 – Frequently Asked Questions
1) Will the Cherne 4-inch Long Test-Ball plug fit a 4-inch PVC waste stack?
Yes. The Cherne 271047 is a 4 in. (100 mm) nominal test plug and the description states it is compatible with PVC pipe. Deflated it measures 2.5 in. diameter by 24.75 in. long, so it drops through a 4-inch opening easily and then inflates to seal. The long body is what lets it bridge a wye fitting instead of just plugging a straight bore.
2) How much head pressure can the Cherne 271047 Test-Ball plug hold during a DWV test?
Rated to 13 psi (0,9 bar) back pressure, which works out to 30 ft. (9,1 M) of water column. That covers a three-story stack test. If you are filling a taller column than 30 feet above the plug, this one is past its rating and you need a plug rated for more head.
3) What pressure do I inflate the Cherne 271047 test plug to, and what do I inflate it with?
Inflate to 30 psi (2,1 bar). It uses a standard tank valve, so an ordinary tire chuck on a compressor, hand pump, or bike pump does the job. Note the two numbers are different and get mixed up on the job: 30 psi is the air you put in the ball, 13 psi is the maximum water back pressure it will hold.
4) Do I need to buy a separate hose to inflate this test ball down a stack?
No, a 3 ft extension hose comes with the 271047. That is what lets you set the ball down inside the pipe and still reach the valve from the opening. Beyond that you only need an air source that mates to a tank valve.
5) What is the difference between a long Test-Ball plug and a regular short test plug?
Length and where it seals. Long Test-Ball plugs like the 271047 are built for waste stack testing and for sealing wye fittings, because the 24.75 in. body spans the branch opening instead of sitting in one short section of bore. A short plug is fine for a straight cleanout or a stub-out, but it will not bridge a wye.
6) What keeps the test ball from getting sucked down the stack when I pull the plug?
A ring and chain assembly on the plug. You tie it off at the opening so the ball cannot be drawn into the DWV system when the column of water releases. Use it every time on a stack test, because retrieving a lost ball from a live waste line is the expensive part of the job.
7) What is the Cherne Test-Ball plug made of, and will it seal against a rough or dirty pipe wall?
Natural rubber, in black. Natural rubber is what gives it the conformability to seal against ordinary pipe wall variation when inflated to 30 psi. Wipe grit off the pipe interior before setting it; debris under an inflated ball is the usual cause of a leaking test.
8) How heavy is the 4-inch Cherne long test plug to handle on a ladder or in a chase?
About 2.74 lb, with an inflated volume of 0.253. It is a one-hand item to set, though the 3 ft hose and the chain add some bulk when you are working overhead in a chase.
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reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the OATEY 271047 come with a warranty?
Absolutely. The OATEY 271047 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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