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.
Cherne introduced the multi-size yellow-top Test Ball® plugs in 2002. 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.
Natural Rubber: Great sealing properties as well as excellent expansion and memory
Schrader Valve Inflator: Includes cap with valve core tightener
Ring and Chain Assembly: Prevents plug from dropping into DWV system during test