What is the primary purpose of flushing a water main?

Flushing a water main is primarily conducted to improve water quality. Over time, sediments, biofilms, and other contaminants can accumulate within the water distribution system, potentially leading to issues such as taste, odor, and discoloration of the water. By flushing the main, these materials are expelled, which helps restore the clarity and safety of the water being supplied to consumers. This process is crucial in maintaining the overall integrity and reliability of the water supply, ensuring that it meets public health standards.

While addressing excess pressure, checking for leaks, and re-establishing flow direction are legitimate activities within water system management, they do not encompass the primary goal of flushing, which is fundamentally aimed at enhancing the quality of the water.