Question about Sta Rite 1 Hp Sta - Rite Abg Swimming Pool Pump

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I have a Sta rite model PLD50 pump and DE filter system. After adding the media, the pressure is good at 12-13 psi for 30 mins. to an hour and then starts to climb toward 20 psi. All the while the discharge stream is diminishing from very strong to very weak. I can turn off the pump for a few seconds and everything returns to normal. Then the cycle starts again. I suspect the cartridge is not seating well over the check valve and it is becoming clogged with DE or the valve is sticking. I've taking the filter apart 3 times, hosed off the media, re-assembled and re-coated the cartridge with the same result. Bad valve, bad cartidge? I'm frustrated.

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Sounds like the cartridge either needs to be acid washed or replaced. Just hosing it off won't do it. To see if it needs an acid wash just put a few drops of muriatic acid on the cartridge after you hose it down. If it bubbles up, then it needs it. Let it soak in a bucket with acid mixed with water. Some pros just pour acid on the cartridge directly, but thats kind of dangerous.

Posted on Jun 03, 2010

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Posted on Jan 02, 2017

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