CHECK THE INFLATION PRESSURE AT LEAST EVERY FOUR (4) HOURS.

A small volume of inflation air over time may/will leak through the elastomeric (rubber) body of every pneumatic plug. This lost air must be replaced or under-inflation may result allowing the plug and any media restrained to dislodge from the pipe. A regulated pressure source may be permanently attached to the plug’s inflation inlet port as an alternative to periodically checking and adjusting the inflation pressure. Consult with a registered professional engineer for the construction and maintenance of such a pressure regulated inflation source.