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Thread: Pump not pulling water question

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    Join Date
    May 2014
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    pennsylvania
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    Pump not pulling water question

    Luckily my pool has been flawless since I joined up here last year, this thread is concerning my sisters pool. They don't keep up with things and it becomes my job to fix it.

    The short, pump only draws about half the amount of water it should, and overtime starts to run dry and loses prime.

    I'll have to give equipment specifics later, but essentially it's a 23,000 gallon inground with associated Hayward pump and de filter. Very simple old school plumbing with only one line coming out of ground from 2 skimmers and a main drain. No valves above ground. Comes out filter one line back into ground to 2 return jets.

    I'm guessing suction side leak. I hooked up a temporary line to pump into pool to bypass any underground stuff and it still is having the problem. Basically it's got to be at the pump and everything there looks good. Pump sounds fine running. How can I tell if maybe I just need a new pump or what is causing it to not pull water. Only fills the pump under the lid maybe halfway then will stop pulling all together.
    Moved so no longer pool owner, keeper of pool of family member

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    Re: Pump not pulling water question

    Have you checked the o-ring on the pump strainer basket? It almost certainly is a suction side leak and that is the most common location for them.

    Also check that the drain valve(s) are snug at the bottom of the strainer basket.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pump not pulling water question

    I will check again but everything looked good and from what I could tell o ring looked fine.
    Moved so no longer pool owner, keeper of pool of family member

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    Re: Pump not pulling water question

    Could a bad motor be causing the pump to not pull water? How could I test that?
    Moved so no longer pool owner, keeper of pool of family member

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    Richard320's Avatar
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    Jan 2010
    Location
    San Dimas, CA (LA County)
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    18,768

    Re: Pump not pulling water question

    Could be as simple as the impeller is clogged up with pine needles or something, They slip right through the strainer basket.

    For air leaks, coat anything that could allow air to enter with shaving cream and see if the foam gets drawn in. You might see foam in the strainer or returning to the pool or actually see the foam being sucked in somewhere.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Join Date
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    pennsylvania
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    Re: Pump not pulling water question

    Thanks guys. Looking into this
    Moved so no longer pool owner, keeper of pool of family member

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    In the Industry

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    Mar 2015
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    New Orleans, LA
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    80

    Re: Pump not pulling water question

    Also alway check skimmers in pool. Sometimes the little flapper doors get stuck up and it will suck the skimmer dry and than it will fill up again. The pump primes and than looses it and repeats.

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