How often should mainline valves be exercised?

Mainline valves are critical components of a water distribution system, serving to control the flow of water and isolate sections of the pipeline for maintenance or repairs. Exercising these valves refers to the process of opening and closing them regularly to ensure they function properly and do not become stuck or inoperable due to debris accumulation, corrosion, or mechanical failure.

Exercising mainline valves annually is considered a best practice in water distribution management. This regular maintenance helps to ensure that the valves are operable when needed, which is essential for both routine operations and emergency situations. If valves are left unexercised for extended periods, they can seize up, leading to complications during critical situations such as installing new lines or responding to leaks.

While some practices might suggest exercising valves monthly, twice a year, or every two years, the annual frequency strikes a balance between maintaining valve operability and being practical for operational management. This schedule allows for sufficient checks while minimizing resource allocation compared to more frequent exercises.