Cherne 270024 2 in. Rubber Test Ball Pipe Plug, Black

Works as it should, and about half as much as it would have been at a local plumbing store.

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.

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!

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.

worked good

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.

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.

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.