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Thread: Sand Filter vs. pump problems

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    Join Date
    Jun 2014
    new albany, MS

    Sand Filter vs. pump problems

    16x32x52 above ground pool, 20" sand filter, 2 HP pump. New Spider gasket & continually get sand back in pool on a yearly basis. Every year, I've had to change sand & underdrain assembly thinking this is the problem (Doughboy Pool, filter, & pump- no laterals with this filter) I'm thinking the pump is too big for my filter or the filter is a "lemon". I need help! Does anyone have any thoughts or answers? I'm at my wits end & about to bury it. But my "grandkids" don't want me to bury pool. Pool just 5 years old. Have had this problem for the last 3-4 years.

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Sand Filter vs. pump problems

    Welcome to TFP!!!

    I kind of feel like that pump may be too big for that filter as well.

    Can you add more details about the specific models? Please add your pool details to your signature as described HERE as it will help us help you.
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    Smykowski's Avatar
    Join Date
    Sep 2011
    Gurnee, IL (North Suburban Chi-town)

    Re: Sand Filter vs. pump problems

    Can you explain what you mean by "no laterals with this filter"? I don't understand how the filter works if there are no laterals.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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  4. Back To Top    #4

    Re: Sand Filter vs. pump problems

    Do you have the Doughboy Media Master 1900 filter? Strange, nowhere on their site or in the documentation to they say what the maximum pressure and flow rate are. But the flow rate won't be too different from other manufacturers.

    After doing some quick research... A typical 20" diameter sand filter is rated to handle about 50 gallons per minute max. A 2-hp pump will be trying to push 80 to 100 gallons per minute (varying greatly depending on pump and plumbing). So, yes, without even seeing the exact specs for your equipment, one can deduce with near certainty that your pump is waaay too powerful for your filter.

    Personally, with that size filter and that size pool, I'd think a 1-hp pump would be perfect. But I'm not an expert (yet!), so don't take my word on it. Hopefully a moderator will move this thread into the "Pumping Station" sub-forum, and you'll get some more educated responses.

    Another thought... After backwashing, are you remembering to "Filter to Waste" (also known as "Rinse") for a few seconds before returning to regular filter mode? If you don't, that can send a little sand and debris into the pool. But this debris will be a one-shot deal, not a continuous accumulation in the pool.
    25000-gallon semi-public IG concrete/plaster pool, Triton II sand filter
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