The process of reversing the flow of water through a pool’s filter is called backwashing. This action removes accumulated debris and contaminants from the filter media, such as sand or diatomaceous earth. For example, a pool owner might initiate this process when the filter pressure gauge indicates a rise above the normal operating range, signaling a buildup of particulate matter.
The practice is crucial for maintaining optimal water clarity and sanitation. By regularly removing trapped dirt and algae, backwashing ensures efficient filtration, reduces the demand on sanitizing chemicals, and prolongs the lifespan of the filter. This cleaning method has been a standard pool maintenance procedure since the widespread adoption of pressure filters in swimming pool systems.
