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Thread: Can I filter a pool that is not full?

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    MJCP's Avatar
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    Sep 2007
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    Can I filter a pool that is not full?

    My water level is below the skimmer and vacuum inlets.
    I have my valves set to only draw from the main drain.
    Assuming there are no leaks that would cause the pump to
    suck air in, can my filter run with the level this low?
    I know that's not the recommended situation, but I am
    wondering if it can be done.
    15x32 Lazy L Inground / Concrete - 20,000 US Gal 1979 build
    1.0Hp Maxiglass/ Sand Filter, 7th season with Pool
    Painted cement finish repainted 2011
    400,000 btu Pentair Master Temp NG

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    Mod Squad jblizzle's Avatar
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    Re: Can I filter a pool that is not full?

    Maybe ... depends if you can get the pump primed.

    BTW, your filter does not run, it just filters. The pump is what runs and moves the water
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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    Mod Squad tim5055's Avatar
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    Re: Can I filter a pool that is not full?

    Quote Originally Posted by MJCP View Post
    My water level is below the skimmer and vacuum inlets.
    I have my valves set to only draw from the main drain.
    Assuming there are no leaks that would cause the pump to
    suck air in, can my filter run with the level this low?
    I know that's not the recommended situation, but I am
    wondering if it can be done.
    Yes it can if you get water to the pump.
    TFP Moderator

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  4. Back To Top    #4
    MJCP's Avatar
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    Sep 2007
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    Michigan
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    Re: Can I filter a pool that is not full?

    Got me
    Thanks for the quick reply

    - - - Updated - - -

    Thx! for the quick reply
    15x32 Lazy L Inground / Concrete - 20,000 US Gal 1979 build
    1.0Hp Maxiglass/ Sand Filter, 7th season with Pool
    Painted cement finish repainted 2011
    400,000 btu Pentair Master Temp NG

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