Cherne® 276348 Test-Ball® Multi-Size Pneumatic Plumbing Plug, 3 to 4 in Nominal, 40 ft Head, 2.8 to 4.25 in Range, Natural Rubber

Cherne® plumbing Test-Ball® plugs were first introduced in 1953 as a more versatile product than traditional mechanical plugs. designed to test drain, vent and waste systems Cherne Test-Ball® plugs could be used in any type of pipe, could be inserted through a test tee, and sealed out of round pipe as well. These test ball plugs have the same great features found in the original test ball plugs, but can be used in more than one pipe size.