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Cherne Single-Size Test-Ball® Plugs are expandable rubber test plugs designed to test drain, vent and waste systems in every type of pipe. Utilizing a standard tire air fitting for easy connections, its inflatable design can be inserted through a test tee to seal out-of-round pipe and hard-to-access openings. These plumbing test plugs are available in a variety of nominal sizes to accommodate your DWV testing needs. Cherne Industries is a global leader in pipe plug, blocking and testing.
From the Manufacturer
Cherne's Single-Size Test-Ball Plugs. Made of natural rubber for excellent expansion and memory. Seals both round and out-of-round pipe. Zinc-plated steel chain and ring handle acts as an anchor to prevent plug from sliding down a line. Fits easily through test tees, sanitary tees, floor drains, and other "tight" situations. Broader expansion range than mechanical plugs.
TM
2025-08-19 13:08:41
Works as it should, and about half as much as it would have been at a local plumbing store.
B. W. Cook
2025-08-01 18:24:54
So listen, here’s the deal how much excitement does a rubber test plug actually have? I mean what could a person actually leave for review for this product here’s what I can say. It worked very well and I did the job that I needed to do. There was also a fun element to it and let me tell you why. If you inflate this thing too much too quickly, it looks like a puffer fish under the ocean so take it easy. That’s what I learned. Take it easy and slated to the right size and it’ll work great.
Ideal home services
2025-07-01 15:13:12
I use this for every shower inspection i have with the city and zero issues. Left one for over a week and the water level never moved. Perfect!
Mack Johnson
2025-06-28 13:50:12
Plumber told me my drain pan in shower might be leaking and said he'd have to do a test and it would cost me a couple of hundred. He explained how to do it...so I bought this and was able to do it myself (failed the test). This cost more than one of the red plugs, but the plug wouldn't quite fit in my drain. This did fit, though you do need to have an air pump to use it.
Customer
2025-05-23 16:45:38
worked good
Network guy
2025-04-26 12:25:59
I tried using a balloon to do a water test on a shower pan liner that I've seen on a video. the balloon popped after a few minutes. the ball is expensive but worth it.very easy to use. just set the ball in the drain. pump it up using a bike tire air pump. i believe i set it to 30psi. remove the bike pump and fill the shower pan with water. Mark the water level on a plastic cup filled with gravel and let it sit overnight. lucky for me there were no leaks.
David Sanders
2025-03-29 14:05:11
This works excellent for checking your shower pan liner seal. After you do you pre-slope you silicone your liner to the drain X out the hole fold down the flaps, X slice the holes for the bolts make sure there is silicone around each bolt hole and bolt down the drain. MAKE SURE to keep weep holes clear..i stick wire in them until the silicone dries. Use a Bike pump to blow up the test ball not a compressor as it takes very little air. Make sure to put rocks around your drain when doing the dry mix bed so water can drain into the weep holes.
Keefe
2025-03-02 10:03:29
My shower had back flow coming up through it. My toilet would start gargling and then here comes the sewage threw the shower drain. I wasn't sure if it would work because of several factors but it worked for my situation. The toilet will gargle but nothing else. This plug has saved the day.
Chris
2025-02-01 20:52:35
Used to plug a 2†thru hull in a boat afloat. Dove under, inserted and inflated and changed the valve inside the boat. Didnt leak a drop of water. Worked perfectly.
stephan
2024-12-22 20:41:48
fast delivery highly recommended
Alanna
2024-12-12 10:07:03
Worked amazing. Had to plug a masive tank to fix a leek and it worked great to plug the hole
Gus
2024-12-09 21:10:47
Worked great
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