What is the minimum flushing velocity recommended for water distribution systems?

The recommended minimum flushing velocity for water distribution systems is established to ensure proper cleansing and removal of sediment and biofilm, which can accumulate in the pipes over time. A flushing velocity of 2.5 feet per second is considered effective for achieving this goal.

At this velocity, water flow is sufficient to dislodge materials that may settle in the pipeline, thus maintaining water quality and system integrity. This velocity allows for effective scouring of the pipeline interiors, which not only clears sediment but also helps mitigate potential contamination and maintain a healthy distribution system.

While lower velocities may not provide adequate scouring and higher velocities could potentially lead to issues like pipe damage or increased wear, 2.5 ft/sec strikes a balance that meets the industry standards for maintenance and operational efficiency in water distribution systems.