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:KIWAOriginally published by AwwaRF for its subscribers in 2003 This publication can be purchased and downloaded via Pay Per View on Water Intelligence Online - click on the Pay Per View icon below