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After removing an dcleaning DE grids my start up pressure was about 3 psi lower than last years running level - about 7 psi.
Opened yesterday, ran filter 24 hours and vacumed today and pressure is about 11 -12 psi. Does it make sens e to back wash this quick? I just added new DE yesterday but did do extensive vacuming.
thanks
Hayward DE 7220
I'm no expert but here is what I do. When you vacuum you're putting tons of guck into your filter, so I usually backwash every time I vacuum. That will lower your pressure and keep the water that's going back into your pool cleaner.
thanks, since DE is pretty cheap, it's probably a wise idea.
I do not backwash every time I vacuum unless I vacuum up a whole lot of debris - which I usually don't. Really, the only time I vacuum up much is upon opening. Otherwise, just watch your filter pressure. When it rises 8-10 psi, it is time to backwash. Actually it is thought that dirty sand is actually a little better at filtering so you don't want to backwash too often.
How important is the rinse cycle and what does it do? I was not taught to rinse by my PB and have never done so.
You should rinse for about 30 seconds or so after every time that you backwash. There is probably a small clear sight glass. You can tell when the water is clear. It usually takes around 30 seconds for my pool. (At least this is true for sand filters. If I am wrong about DE filters, somebody please chime in.)