What is the purpose of flushing a water main?

Flushing a water main primarily serves to remove sediment and improve water quality. Over time, particulates, sediment, and other deposits can accumulate within water mains, which can lead to decreased water clarity, taste, and overall quality. The process of flushing involves pushing large volumes of water through the system at high velocities, which helps to dislodge and carry away these sediments. This practice not only enhances the aesthetic quality of the water but also helps maintain the integrity of the water distribution system by preventing buildup that could lead to clogs and water quality issues.

Additionally, while introducing chemicals for disinfection may be a function of water treatment processes, this is not the main goal of flushing. Flushing does not involve replacing old pipes, as that would be a separate maintenance process involving physical infrastructure changes rather than the management of existing water quality. Rerouting water flow during maintenance can be necessary, but it is not directly related to the flushing process itself. Flushing is specifically focused on the maintenance of water quality within the mains.