270040 Rubber Test Ball Pipe Plug, 4", Black

I use these blow up balls on many jobs they woork great.

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.

Me parece un producto muy bueno.

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!