The term refers to the process of reversing the flow of water through a filtration system containing granular media, typically sand. This action serves to dislodge and remove accumulated debris and particulates that have been trapped within the filter bed during normal operation. For instance, a decrease in water pressure or a noticeable reduction in flow rate often signals the necessity of this maintenance procedure.
Performing this action is crucial for maintaining optimal filter performance and extending the lifespan of the filtration system. By removing trapped solids, it prevents clogging, which can lead to increased energy consumption and reduced water quality. Historically, this practice has been a standard component of water treatment protocols in various industrial and residential applications, contributing to efficient and effective water purification.
