In 1953, while working on an institutional job, Lloyd Cherne vulcanized a tire’s Schrader valve to a child’s inflatable rubber ball to create the first-ever pneumatic plumber’s test plug.Since then, the use of both pneumatic and mechanical pipe plugs has expanded for plumbing and municipal sewer markets in the United States. Pipe plugs are used to stop or redirect the flow of wastewater during maintenance and testing in DWV (drain, waste and vent) and sewer systems. Many plugs are custom-made to suit the precise specifications required in a variety of applications, including emergency situations.How do you decide between pneumatic and
