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Thread: Sand Filter Replacement - What Size?

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    CUTiger78's Avatar
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    May 2009
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    NoVA
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    Sand Filter Replacement - What Size?

    Well, my Hayward filter self-destructed yesterday - it blew out along about a 10 inch crack about a third of the way down from the top. Looks like a catastrophic pressure vessel failure!

    My question is, how big a filter do I need to replace it with? The label on the old one long since became unreadable.

    Pool size: 36,000 gal. gunite w/ light bather load.
    Pump: 1 hp Hayward SuperPump
    Plumbing: 2" w/ no water features

    The Hayward S220T w/ 250 lbs. of sand will provide a 2X turnover in 24 hrs., according to the charts at the Hayward site. Is that enough?

    Any thoughts?

    Thanks!

    Hank
    36K gallon 42X22 gunite/plaster kidney-shaped IG;
    1 hp Hayward Super Pump (new in 2012);
    Hayward S244T sand filter w/ Zeosand (both new in 2009);
    175K BTU LAARS Lite2 LG natural gas heater; Polaris 380;
    TF-100 test kit.

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    duraleigh's Avatar
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    Apr 2007
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    Sebring, Florida
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    Re: Sand Filter Replacement - What Size?

    Hey,

    Welcome to the forum. Without doing any calculations, I would like to see the filter just a little bigger. GPM's become very important in the pump/filter relationship,

    Assuming your pump puts out about 70-80 gpm, you would do very well with a filter that's rated for 100gpm+.

    You literally cannot get one too big but you can easily get one too small. There's lot's of advantages to a little extra capacity in the filter and lot's of disadvantages in one too small.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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