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Thread: DE Replacement

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  1. #1
    Join Date
    Jun 2006
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    Philly Burbs
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    41

    Default DE Replacement

    Can anyone tell me how you know when all of the DE is backwashed off the filter so you know when to stop and refill with DE. Judging by what comes out I know that all the dirty DE isn't being wsahed out. This is my problem because I guess on how much to replace. The manual says replace withg what you started witht but if did that the filter would clog up? Do you just go by the color of the water in the glass, time of backwash, or go buy how clean it runs out of the end of backwash hose? Thanx.

    Jandy DE 48 Filter
    IG Plaster 23000

  2. #2
    Join Date
    Dec 2004
    Location
    IL.
    Posts
    345

    Default Re: DE Replacement

    In normal operation, I backwash until the discharge is clear. Then rinse, then set back to filter, and add DE until the pressure reading hit's where it should begin (for me, 10 psi).

    If the pressure doesn't drop to below the starting pressure, I break down and manually clean the grids.

  3. #3
    Join Date
    Dec 1969
    Location
    Cedar Hill, TX (Dallas)
    Posts
    66

    Default Re: DE Replacement

    There's no way to know for sure how much to add.. that's why you need to tear the thing down every few changes and clean it out manually.

    Robert

  4. #4
    Join Date
    Apr 2006
    Posts
    395

    Default Re: DE Replacement

    I have found that my Hayward never completely removes the DE when backwashed. Its a big unit, it takes 7.5 pounds of DE when you charge it. What I do when the pressure goes up is take the band clamp off and manuall hose it down to get all the DE out. Then I refill it with a full 7.5 pounds. I find that in 5-6 month season I only have to do this twice.

  5. #5
    Join Date
    Jun 2006
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    Philly Burbs
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    41

    Default Re: DE Replacement

    Tanks to everyone for the useful info.

  6. #6
    PatL34 is offline Lifetime Member Widget Weaver PatL34 2 stars PatL34 2 stars
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    Dec 1969
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    Saint Cloud, FL
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    86
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    331

    Default Re: DE Replacement

    The method I use to backwash is run in backwash until clear, then filter for about 2 minutes, then backwash again until clear, filter one more time, and backwash once more until clear.

    This "bumping" feature helps to dislodge as much of the old stuff as possible.

    The DE48 should require about 6 lbs of DE only and should not be exceeded, otherwise you will be back washing more than you need. It should say on the side of the filter how much to add, or check with the manufacturer's web site.

    Hope this helps.

    Pat
    20,000 Gallon IG Diamond Brite pool, 1.5 HP Sta-Rite pump, Hayward Microclear DE3600 filter, Favco solar panels, Poolpilot DIG-220 with SC-48 cell.

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