Cherne 276348 3 in.- 4 in. Multi-Size Test-Ball Plug, Black

The Cherne Test-Ball continues to be the most trusted pneumatic test ball in the industry. Designed for applications from pressure testing and blocking of residential DWV systems to repair maintenance and installation of municipal infrastructure piping systems, the Cherne Test-Ball is the one ball that does it all.

• One size fits multiple pipe diameters, doing the job of 2+ single-size plugs.
• Use to block flow (water DWV test) or as a back plug for sewer air testing.
• 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
• Natural rubber provides great seling properities as well as excellent expansion and memory