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Thread: how do I figure out my flow rate???

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    LatinMass's Avatar
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    Jun 2009
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    south east Virginia
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    how do I figure out my flow rate???

    I am concerned that my flow rate will be too high for the swg I purchased (should be 700-4000 gph).
    I have a 3/4 hp Magnetek pump and a 100# Hayward Pro sand filter with a rated flow of 76 gpm.
    How do I calculate my flow rate to make sure I am within the recommended for the swg???
    PLEASE HELP!!!!!!!
    Alyssa, 2nd year pool owner and mom to 8 lil' swimmers!
    18' X 48" Intex metal frame ag 6,423 gal (set up on concrete patio)
    3/4 hp Magnetek pump and 100# Hayward Pro sand filter
    Running an Intex Krystal Clear Deluxe SWG and using BBB.
    TF-100 Test Kit

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: how do I figure out my flow rate???

    Figuring out you actual flow rate is difficult and requires more information than you have given here. But, with a 3/4 HP pump the odds are good that your flow rate is below 4000 GPH.

    Also, if you go a little over the design flow rate, it won't cause any dramatic problems.
    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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    LatinMass's Avatar
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    Jun 2009
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    south east Virginia
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    Re: how do I figure out my flow rate???

    Thanks for your reply! I was feeling a bit nervous and probably should have just asked if you thought I was within those rates. Thanks again!
    Alyssa, 2nd year pool owner and mom to 8 lil' swimmers!
    18' X 48" Intex metal frame ag 6,423 gal (set up on concrete patio)
    3/4 hp Magnetek pump and 100# Hayward Pro sand filter
    Running an Intex Krystal Clear Deluxe SWG and using BBB.
    TF-100 Test Kit

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