When to Backwash A Sand Filter | Sand Filter Maintenance
Mar 11, 2018· As a sand filter collects more particles it becomes less efficient, collecting more and more dirt in the sand. It''s time to backwash a sand filter when the pressure gauge on the filter reads 810 pounds higher than it did when the sand was new and clean. Sand Filter Maintenance. There are three main types of pool filters: Sand filters, DE ...