TP34 Waffle Body Pneumatic Hydraulic Test Plug Inflatable with Air or Water, 3 to 4 Inch

Worked as advertised . Would by again

Well built. Heavy duty. Does what it says. Seals very well. Like the included retrieval strap and handle.Used with VIAIR (00016 6' Portable Compressor Air Extension Hose https://smile.amazon.com/gp/product/B00ELJD0BW/ to block septic tank 4" output pipe while fixing hole in a downstream fitting. A little hard getting around the corner in the T from the filter pipe section into output pipe. Found it helped to squeeze some air out of the plug then capping the air hose to hold it slightly flatter for insertion.For use with the air hose, removed the guts from the plug's schrader valve. Even though the hose has the piece to open the valve, I wanted to be sure it couldn't be accidentally locked in place somehow. The hose has no place to install the valve at the pump end. Therefore...- Connected hose tight to plug.- Squeezed plug to flatten a little and capped with a regular schrader valve cap.- Inserted into down into filter pipe and 90 degrees through T into output pipe.- Removed cap and Inflated with bicycle pump just enough to grab plus a couple of extra pumps.- Folded the hose and pinched HARD while disconnecting pump and capping with the valve cap.- Made the downstream repair.- Removed cap to deflate then removed plug.Hint: When done, replaced air hose cap then soaked the whole thing in Clorox Cleanup (could use bleach) for a few hours, swished it around in a bucket, then rinsed. I don't know for sure, but figured it would probably not hurt the rubber.

Worked fine for 3” pipe plumbing test held back about 35 gallons for 12hrs during inspection

It held long enough for the inspector

Worked as advertised but u better check for leak down in advance if this is to be used for flood prevention

These test balls are great for doing sewer leak detection. They slide through the lines fairly easy and are smaller in diameter before inflated than cherne. The pressure relief valve prevents them from popping if over inflated. They are very thick rubber and last a long time. Only problems I've encountered is finding where to buy and over time the valve will break. That's after months of daily use, spinning and pushing them long distance down lines. I would like to find just the valve adaptor. I have several test balls with no valve adaptor. They can also be used with a water hose and will still plug the line. The ball itself would last for years. I would highly recommend this test ball to anybody doing leak detection on a regular basis.

I needed to insert it 20 ft down the pipe. Attached 1/2 inch pex pipe with a hose clamp to it and pushed it in without any problems. Pumped it to almost 40 psi through 1/4’’ plastic hose and it worked flawlessly. Just to be sure I could deflate it I removed the Schroeder valve from it and left only the one attached to the very end.

Can't say if this plug works OK or not. I needed to be able to insert this through a cleanout on the side of a vertical 3" cast iron pipe. It's too long and too stiff. There was no way to get this plug through the cleanout. You'll need a straight shot from the opening to the location where you're going to install this plug.