Water distribution valves are among the most important, and often overlooked, assets in a municipal water system. Utilities depend on these valves to operate properly when a water main breaks, a pressure zone must be isolated, or emergency repairs are required. Yet a valve that has not been operated for years may be difficult to turn, partially inoperable, or completely seized when it is needed most.

A systematic valve exercising program is a fundamental part of preventative maintenance and effective water distribution system management. Routine water valve exercising helps utilities identify operating problems before an emergency occurs, maintain accurate valve records, and make informed decisions regarding valve maintenance, rehabilitation, and replacement.