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Thread: Filter sand excreted during rinse?

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    Filter sand excreted during rinse?

    Just doing my spring opening and I am seeing about a 1/2 cup filter sand come out of the blue waste hose whenever I do a 3 minute rinse, but none during a backwash or during filtration.

    Would this be a broken lateral, something else or just the need to gently clean the sand with a garden hose? (Just curious before I dig out 200lbs of sand to check the laterals)

    Thanks.
    Pool
    Vinyl 24 foot Above Ground Circular.
    50,000 Liters / 13500 Gallons.
    Filter
    Sta-Rite T-200BP-1 Sand Filter.
    200 pounds of sand, replaced May 2010.
    2.18 ft2 :: 44 USgpm :: 20 USg ::50 PSig
    Pump
    JWPAS5FC-2A3 (1-1/2hp)

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    duraleigh's Avatar
    Join Date
    Apr 2007
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    Sebring, Florida
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    30,083

    Re: Filter sand excreted during rinse?

    Since it's only doing it on rinse, there is no need to suspect the laterals. It is very likely a bad spider gasket in the multiport valve. Pretty easy DIY once you get the right gasket.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Filter sand excreted during rinse?

    Turns out I was wrong. The water wasn't clear enough yet (was just in the opening process) to see the sand sitting on the bottom of the pool. Once I saw that the spider gasket was still good (thankfully, I have a Sta-Rite model that is now obsolete and would require new plumbing) I opened up the filter and found that 3 of my 8 laterals had come off. Not broken, just come off. The housing assembly that holds the laterals was coming apart, bottom separating from top, so those 3 laterals just slipped right off.

    This is my fix, I don't think there should be a problem with it. Does anyone know why this would not work? (I basically clamped around the halves and then cable-tied the rest of the laterals so that they won't come lose again.)



    Pool
    Vinyl 24 foot Above Ground Circular.
    50,000 Liters / 13500 Gallons.
    Filter
    Sta-Rite T-200BP-1 Sand Filter.
    200 pounds of sand, replaced May 2010.
    2.18 ft2 :: 44 USgpm :: 20 USg ::50 PSig
    Pump
    JWPAS5FC-2A3 (1-1/2hp)

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Filter sand excreted during rinse?

    That should work.

    By the way, you're not the first person this season that's reported the lateral holder coming apart.
    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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