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Thread: Pull out filter vs. Backwash

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    Pull out filter vs. Backwash

    I have DE filter that does not take long to go from 13-15 psi to 20 and then beyond.

    When I remove the filter, the screen on top is depressed and algae and DE have collected on top of it. Is this likely causing the rapid rise in pressure?

    Instead of backwashing, should I just commit to removing the entire filter everyday for awhile and hosing it off?

    Thanks in advance.
    25,000 gallon in-ground pool, Nautilus DE filter

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    Richard320's Avatar
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    Re: Pull out filter vs. Backwash

    What does the water look like? If it's a cloudy, green sludge pond, the filter's loading up because it's working. Fix the water and the filter will be able to catch up, and after that it will be easy.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Pull out filter vs. Backwash

    Thanks for the prompt response!

    It's cloudy, but not "sludgey." This is our 2nd year with the pool as it came with the house we bought. Last year, there was a ridiculous amount of sludge as the pool hadn't been opened in 3+ years.

    For the meantime, should I just suck it up and remove the filter and hose it down on a daily basis?
    25,000 gallon in-ground pool, Nautilus DE filter

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    Re: Pull out filter vs. Backwash

    Welcome to the forum. When you post almost identical questions twice, it is confusing to everyone. I removed your other post so we can all help you in this one thread.

    I am not a DE expert but it seems like your filter is doing exactly what it's purpose is and you simply have a lot of junk to filter out of your pool. How long does it take to get to 20 psi from the 13-15.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    Re: Pull out filter vs. Backwash

    Thanks for the welcome and clarification.

    About an hour if I use only a pound of DE. I've found that if I use more than that, it "filters" too quickly.

    I was really surprised at how the screen on top of the filter compressed as if sucking in on itself.

    I just pulled the filter out, hosed it down, popped the screen back out and am running the pool without DE added to make sure the chlorine is having a chance to actually circulate.

    Can a DE filter with DE added still do the trick in the short term to get the algae out?
    25,000 gallon in-ground pool, Nautilus DE filter

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    Re: Pull out filter vs. Backwash

    Can a DE filter with DE added still do the trick in the short term to get the algae out?
    No filter of any type or size will remove live algae from a pool. Algae (living) can only be removed by first killing it, keeping it killed, and then removing the dead debris from the pool through filtering.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  7. Back To Top    #7

    Re: Pull out filter vs. Backwash

    This may be redundant, but...
    Assuming your pool water is not balanced since your are questioning the filter performance. DE filter media should always be present with this type filter, that is how it works. Make sure all of your grids have no worn through areas such as at the corners - that they don't need replacing. O ring on the filter, intact? $5 fix. SCRUB your pool walls if you have not already - walls, tile, steps, ladder steps - everything. Algae grows FAST if all blooms not removed.
    Julie M.
    Pool Website
    Pool Owner
    27K gal, IG concrete Lazy L shape installed 1991 2nd owner, 2013: 1st season with Hayward 1 HP MaxFlo XL dual speed pump, Hayward ProSeries Top Mount 300lb Sand filter, Shark Vac XL cleaning robot (previously Hayward DE filter and 1 HP century pump, Polaris 380 suction side cleaner) Country Dweller

  8. Back To Top    #8

    Re: Pull out filter vs. Backwash

    Quote Originally Posted by julieswimtown
    O ring on the filter, intact? $5 fix.
    Is this the O ring found on the bottom of the metal canister that the filter rests on? I just opened mine and noticed that it broke.
    25,000 gallon in-ground pool, Nautilus DE filter

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    Re: Pull out filter vs. Backwash

    http://www.hayward-pool.com/pdf/manuals ... DExx20.pdf

    Page 10 in this Hayward manual, See number 31 O rings.
    Julie M.
    Pool Website
    Pool Owner
    27K gal, IG concrete Lazy L shape installed 1991 2nd owner, 2013: 1st season with Hayward 1 HP MaxFlo XL dual speed pump, Hayward ProSeries Top Mount 300lb Sand filter, Shark Vac XL cleaning robot (previously Hayward DE filter and 1 HP century pump, Polaris 380 suction side cleaner) Country Dweller

  10. Back To Top    #10

    Re: Pull out filter vs. Backwash

    I'm experimenting here and after pulling out the DE filter, hosing it down, pushing the screen back "up," I ran the filter (again without DE) for about an hour before it went from 13 psi to 20.

    Could there be so much dead organic matter that it is still covering the screen, thus raising the pressure?
    25,000 gallon in-ground pool, Nautilus DE filter

  11. Back To Top    #11

    Join Date
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    Re: Pull out filter vs. Backwash

    I have a cartridge filter, so I don't know the specifics of DE. However, it sounds like the filter is doing it job and you need to follow the shock process, which is linked to my [s:1em9fl6c]filter[/s:1em9fl6c]signature. What kind of test kit do you have? If not a TF-100 or K-2006, get one of them and post up a full set of test results. Then we will be able to help you more.
    John
    7 year old ~13,500 gal 24' AGP with 1.5 hp Proline pump, 150 sqft Pleatco cartridge, filled with well water with pH of about 4.5.
    Wanda the Whale pool vacuum, home made heater, Taylor K-2006
    Cloudy Pool? 1) Order test kit. 2) Follow SLAM
    New to TFPC? Read Pool School a few times, then post questions. PoolMath will help with chemical additions.

  12. Back To Top    #12

    Re: Pull out filter vs. Backwash

    ^^^^^

    Will do. Thanks for the help everyone.
    25,000 gallon in-ground pool, Nautilus DE filter

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