I believe the general rule is you backwash to get a baseline pressure reading. From that point you know you need to backwash when the pressure is 10# above that baseline.
Re: when to backwash sand filter
I believe the general rule is you backwash to get a baseline pressure reading. From that point you know you need to backwash when the pressure is 10# above that baseline.
rectangle 11.5K gal IG concrete pool;; 125sf cartridge filter; 2hp 1 speed pump; K-2006, k-1766; PF:10
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