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Thread: Sand dumping into pool

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    Sand dumping into pool

    I have a Hayward S200 Sand filter and recently replaced the sand. Took old sand out, added water then the new sand (200# as the specs indicated). It's been a few weeks and everything seems ok unless we backwash or have the filter turned off for a time. As soon as we turn back on to filter, we can clearly see sand shooting into the pool for a minute or so. It stops after that and everything is fine, but makes the water all cloudy and have to vacuum up the sand once it settles. When we don't backwash the filter seems fine and pool is crystal clear-no sand deposits. Could we have too much sand it the filter? Broken lateral? Something else?
    24,000 gallon ig fiberglass pool
    1 hp hayward pump
    hayward sand filter (250 lb)
    madisonville, ky

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    dmanb2b's Avatar
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    Re: Sand dumping into pool

    After backwashing, are you rinsing the filter for the recommended 3 minutes or until the sight glass is clear?
    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: Sand dumping into pool

    Yes, there is sand in the glass for a minute or so too-then pretty much clears (a bit of sand seems to stay in the bottom of glass, but water is clear). What would cause the sand only when starting up on filter?
    24,000 gallon ig fiberglass pool
    1 hp hayward pump
    hayward sand filter (250 lb)
    madisonville, ky

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    Mod Squad Bama Rambler's Avatar
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    Re: Sand dumping into pool

    Since you just replaced the sand I'd suspect something internal. Maybe the center pipe or the lateral assembly. There was plenty of freeboard left in the filter after adding the sand wasn't there?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Sand dumping into pool

    Hmmm, what's freeboard?
    24,000 gallon ig fiberglass pool
    1 hp hayward pump
    hayward sand filter (250 lb)
    madisonville, ky

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    Mod Squad Bama Rambler's Avatar
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    Jun 2009
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    Re: Sand dumping into pool

    The distance between the sand and the top of the filter. Should be about 10" or so.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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