Anderson Manufacturing Inflatable Test Plug
Inflatable plugs expand like a balloon inside the pipe. They work great for "out-of-round" holes or to access hard to reach locations.
Diameter: 4″ (100mm)
Pipe Application: 4″ pipe
Minimum Diameter:3.41″ (87mm)
Maximum Diameter:4.25″ (108mm)
Proper Inflation Pressure:30 PSIG
Maximum Allowable Back Pressure (air):13 PSIG