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Thread: Pentair Filter Pressure Problem

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    Pentair Filter Pressure Problem

    Hello,
    We've had some nasty wind, so I've been out cleaning MAJOR debris from our 30K gallon pool. We have a Pentair DE filter that my husband cleaned out this afternoon. It was working just fine, then out of the blue the pressure dropped to 0 psi. I cleaned out the basket which was very full after only 10 min of sweeping and got back to work. After sweeping for another 5 min or so, the pressure dropped to 0 again. I cleaned out the basket again, it was slightly less full this time. Now, the filter won't prime. I ran it for 10min waiting, but 0 psi. Any suggestions?

    Thanks.
    30,000 gal inground pool with attached waterfall spa.
    60 sq ft American Titan (Pentair) DE filter with no backwash.
    Not sure about the pump.

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    dmanb2b's Avatar
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    Re: Pentair Filter Pressure Problem

    It sounds like a suction side clog, rather than a filter problem. Do you have a skimmer door (weir), it might be jammed from the debris.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

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    Re: Pentair Filter Pressure Problem

    no skimmer door, I'm thinking about taking the check valve apart. I can see bubbles passing through, something seems wrong about that. Can you use a drain snake in pool plumbing?
    30,000 gal inground pool with attached waterfall spa.
    60 sq ft American Titan (Pentair) DE filter with no backwash.
    Not sure about the pump.

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    dmanb2b's Avatar
    Join Date
    Apr 2009
    Location
    NY
    Posts
    3,728

    Re: Pentair Filter Pressure Problem

    Hold off on the sanke idea for now, perhaps try reverse flowing with a garden hose and a rag or attaching a drain king.
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

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    Re: Pentair Filter Pressure Problem

    Thank you for your help. The clog was at the Jandy valve that switches the uptake from the pool to the spa. We switched the valve, and let the pump pull from the spa,which filled the pipe with water. Then we switched it back, and the clog moved on through.
    30,000 gal inground pool with attached waterfall spa.
    60 sq ft American Titan (Pentair) DE filter with no backwash.
    Not sure about the pump.

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    Re: Pentair Filter Pressure Problem

    I am having the same problem where is the check valve located??? Pentair 420.

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