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Thread: Sand???

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    Join Date
    Jan 2009
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    Atlanta, GA
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    Sand???

    I've noticed a little sand on the ground where I've backwashed (I've been back washing a lot). I also noticed some sand in my Polaris collection bag and a little in my skimmer baskets. Is this telling me something about my sand filter possibly? I have never changed my sand or added sand to my filter.
    Steve
    Atlanta, GA

    Inground Vinyl, 30,000 gallon, 20x40 Lagoon, Pentair Single Speed 1-1/2 hp Superflow, Pentair SD 80 Sand Filter, Polaris 280 cleaner w/ Booster pump, Pentair Easytouch.

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    JasonLion's Avatar
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    Re: Sand???

    A little sand while backwashing is nothing to worry about. But sand getting into the pool suggests that there is something wrong inside the filter, most likely a cracked lateral.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Sand???

    Jasonlion,
    I've only noticed the sand once in the skimmer and the Polaris bag. They both had them the same day. It hasn't seemed to happen again. I'll keep a check on it. Is a lateral an easy fix?
    Steve
    Atlanta, GA

    Inground Vinyl, 30,000 gallon, 20x40 Lagoon, Pentair Single Speed 1-1/2 hp Superflow, Pentair SD 80 Sand Filter, Polaris 280 cleaner w/ Booster pump, Pentair Easytouch.

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    JasonLion's Avatar
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    Re: Sand???

    Replacing a lateral is a fair bit of work because you need to take all of the sand out of the filter to be able to get at them.

    If it only happened once the filter is probably fine. A cracked lateral will leak some sand continuously.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Mod Squad woodyp's Avatar
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    Re: Sand???

    Ok...gotta ask. What cracks a lateral if it is sitting there packed in sand and water. Freezing is the only thing I can come up with.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Smykowski's Avatar
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    Re: Sand???

    Improper chemistry can weaken the plastic.
    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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    JasonLion's Avatar
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    Re: Sand???

    They are under a fair bit of pressure. As the plastic ages it gets more brittle and occasionally they crack. It is also fairly easy to break them if you move the filter with sand in it or aren't careful enough when removing sand.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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