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Thread: Sand in sight glass?

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    Sand in sight glass?

    When back washing or rinsing, I see sand in the sight glass of my brand new hayward unit ( for an above ground pool.) I have to wonder why, and am I pumping sand out of the filter with every backwash? I followed the instructions for filling the filter tank. I thought a small amount at first would be ok,,and I have removed the sight glass and emptied the sand ,but it returns . Is this normal?

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    AnnaK's Avatar
    Join Date
    Jul 2007
    Eastern Pennsylvania

    Re: Sand in sight glass?

    I always see a little sand in the sight glass during backwashing. It goes away in the rinse cycle—all but a few grains.

    12,500 gal AGP, Hayward sand filter, Pentair 2-speed pump, timer.
    Please visit our Pool Issues pages for information about step weights, managing the solar cover, and PoolSkim.

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    Crzyfrlss1's Avatar
    Join Date
    Jun 2008
    Central, CT

    Re: Sand in sight glass?

    Sounds normal to me, mine does the same thing.

    You will lose a very minimal amount of sand while backwashing, but we're supposed to open up the filter once a season for cleaning and maintenance anyway.
    Intex 15' X 48" metal frame pool
    Waterway Supreme 1hp 2 Speed pump
    Hayward X-Stream 150 Sq. Ft. Cartridge Filter
    2-2'x20' Sungrabber Solar Panels hooked up in parallel on a Goldline GL-235 controller.

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    Join Date
    Jun 2008
    Near Knoxville TN

    Re: Sand in sight glass?

    Just like the replies above I always see some sand then it clears during the rinse. After about 18 years of backwashing to the same area it looks like a small beach.
    18X36 IG vinyl 22100 gal. 1.0 HP Hayward Pump w/300# Hayward sand filter.

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