Re: DE filter backwash (newbie)
My post backwash pressure is 12psi. I backwash when it climbs to 20psi.
Given the fact your post backwash pressure is 18psi, you may want to consider opening it up and cleaning the grids. You really have no way of knowing the last time that was done so might as well start from scratch.
14'x31' kidney 21K gal IG plaster pool; SWCG (Saline Generating System's SGS Breeze); Pentair FNS Plus 48 DE DE filter; Whisperflow 1 HP pump; 8 hours hrs; kit purchased from Ben; utility water; summer: none; winter: none; PF:5.7
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