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Thread: DE Filter Grid Replacement

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    Question DE Filter Grid Replacement

    I have a Pentair FSN 48 Filter DE system and have a tear in one of my filter grids, the rest seem ok, I was wondering if I should be replacing the entire set at the same time or it should not really matter.

    We bought the house 3 years ago so the filters are atleast 3+ years old. Local pool store said its best to replace all filter due to the pressure in the system and how the new vs old grids would work - not sure I agree with the stores logic.
    17500 Gallons, IG, Plaster, DE Filter, Built 1997, No Spa, Polaris 280

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    Re: DE Filter Grid Replacement

    Did you accidentally tear the grid or was it torn from wear and tear? If it is from wear and tear then I would replace all the grids, but if you tore it, then I would inspect the condition of the other grids.

    Follow this advice for inspecting and cleaning the grids, DE Filter Cleaning Tutorial.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
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    Re: DE Filter Grid Replacement

    I had DE coming back in the pool so checked the filter and found the maniford was cracked in many places so purchased a new one, then I checked the grids and followed the tutorial and found 1 grid had a tear which I beleive is from wear.
    17500 Gallons, IG, Plaster, DE Filter, Built 1997, No Spa, Polaris 280

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    Re: DE Filter Grid Replacement

    I would buy a new set of grids in your case.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Re: DE Filter Grid Replacement

    thanks for the advise - will pull the trigger on a new set.
    17500 Gallons, IG, Plaster, DE Filter, Built 1997, No Spa, Polaris 280

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    Re: DE Filter Grid Replacement

    Looking around the web, I see pleatco brand and unicel - anyone now if there is a difference in quality? the pleatco brand is cheap for buy.
    17500 Gallons, IG, Plaster, DE Filter, Built 1997, No Spa, Polaris 280

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    Re: DE Filter Grid Replacement

    From what I searched here at TFP it seems that the Pleatco grids are fine. The Unicel are OEM grids for Pentair.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

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    Re: DE Filter Grid Replacement

    If the manifold was cracked, make sure the GPM output of your pump matches the designed flow rate of your filter. Unless the filter is fairly old, the manifold typically only breaks for one of two reasons- to much flow from the pump or excessively high pressure (not back washing often enough).

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    Re: DE Filter Grid Replacement

    Thanks MHarvey86 - I think the fault is all mine - I did very few backwashes last year and paying the price.
    17500 Gallons, IG, Plaster, DE Filter, Built 1997, No Spa, Polaris 280

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    Re: DE Filter Grid Replacement

    Quote Originally Posted by onedah View Post
    Looking around the web, I see pleatco brand and unicel - anyone now if there is a difference in quality? the pleatco brand is cheap for buy.
    I did the Unicell, thya have been fine. I believe there is a You Tube video on the grid replacement according to one punter on this site. I took a bunch of photos during the swap out, but if there is a vid then that would be better.

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    Re: DE Filter Grid Replacement

    Update on Progress:

    - Purchased a replacment manifold due to crack
    - Purchased replacement filter grids, I went for the pleatco grids which look as good as the Unicell and saved around $35 on all 8 grids
    - Rotated wheels on Paloris cleaner (280) as 1 wheel had broken teeth
    - Overall pool is now crystal clear - sand that was in the pool as been sucked up and back in the filter
    17500 Gallons, IG, Plaster, DE Filter, Built 1997, No Spa, Polaris 280

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    Re: DE Filter Grid Replacement

    Nice work!

    I am a big fan of my Pleatco filter cartridges.
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    Re: DE Filter Grid Replacement

    I am having the same issue. I cleaned the filter and noticed the cracked on the manifold (patched it with epoxy). Some filters have holes but I continued to reuse them. I noticed the pool got cloudy and DE powder on the pool surface. Just ordered new filter and manifold.

    Does the DE Powder damage the pool surface, etc?

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