Hello. I replaced my sand filter with a cartridge filter this year. When I started it up it was running around 12 psi. About an hour or so later the psi was around 25, suction was down, and so was the flow back to the pool. I took the cartridge out to make sure that was the problem ... and it was as I was back to 12psi w/o the cartridge.
Is it normal for these to get this dirty at opening? I have hosed it off about 4 times today. The cartridge is out of the filter right now. I don't know what will happen if I ran it all night. I'd be well past 50psi most likely.
Do the cartridge spray cleaners really work?
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