Why does Jamestown flush their water mains twice a year?
Almost all water pipes have a thin film of rust on the inside. Experience has shown that the thin film causes no problems but may make the water look bad. Minerals and sediment also settle out of the water to the bottom of the water mains. Buildup of this sediment can cause clogging of equipment or use up the disinfectant in the water as it passes through the pipes.
