Establishing Site-Specific Flushing Velocities

Utilities need guidance related to appropriate flushing velocities in order to achieve a balance between water quality improvements, demand for O&M resources and water conservation. The objective of this project was to determine the range of flushing velocities required to dislodge and remove various accumulated materials from water distribution mains based on site-specific conditions. Twelve utilities from 3 countries (USA, UK, Australia) participated in this study. Research Partner: KIWA