What is the main purpose of uni-directional flushing?

Uni-directional flushing primarily aims to maintain the water distribution system's quality by systematically flushing out stagnant water and sediment that may accumulate in the pipelines. By creating artificial dead ends, the flushing process allows for a concentrated flow of water in one direction, effectively sweeping out impurities and improving overall water quality.

This method is especially useful in areas where conventional flushing may not fully achieve desired results, as it targets specific sections of the distribution system. The focused flow helps to dislodge and remove sediment buildup that can affect water quality, thereby ensuring that the water delivered to consumers meets health and safety standards.

The other choices, while relevant to water system management, do not align with the primary objective of uni-directional flushing. Cleaning water storage tanks focuses on the storage aspect rather than the distribution system itself. Improving wastewater treatment is a separate process that deals with sewage systems, and balancing water pressure can be a related concern but is not the core function of uni-directional flushing.