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Thread: Only took 1/4 cup of DE to raise filter pressure?

  1. Back To Top    #1

    Join Date
    May 2014
    Location
    Burlington, NC
    Posts
    45

    Only took 1/4 cup of DE to raise filter pressure?

    I am SLAMing today. Just got back from the store with DE to add to my sand filter I put in shock level liquid chlorine first. Then added 1/4 cup of DE as recommended here, not the 1 cup suggested on the side of the box.

    Pressure gage before 1/4 cup of DE:
    10 PSI

    Pressure gage after 1/4 cup of DE:
    11+ PSI (but not 12)

    Is that all I do for now?
    18,000 gallon IG vinyl
    Hayward S220T sand filter, replaced sand 2013
    Sta-Rite pump, 1HP?
    New liner, 5/12; pool built in 1981;

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Only took 1/4 cup of DE to raise filter pressure?

    Yea, you are fine. Check the filter in a few hours and see if the pressure has gone down, just as a double check, but that is probably all you need for your specific filter.
    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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