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Thread: Newbie backwash mistake

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    Join Date
    Nov 2014
    Location
    Dallas, TX
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    14

    Newbie backwash mistake

    Okay, I just made my first (and probably not last) mistake. When doing the backwash for the first time (we just moved in to our house a week ago) I left the polaris on while doing the backwash. It doesn't look like a lot of DE made it in to the pool but there definitely is some. Do I need to vacuum it out or just leave it over the winter and over time let it make its way out?

    Thanks in advance for your help.
    35k in ground plaster pool, Pentair FNS Plus 48 DE Filter

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    37,879

    Re: Newbie backwash mistake

    Welcome to TFP!

    You will need to vacuum out the DE at some point. Now is better than later, but you can wait if you need to (as long as no one is swimming).

    I suspect something was wrong other than just the cleaner running. While it is best to make sure the pool cleaner is turned off when backwashing, there is no reason running the cleaner should allow DE to get in the pool. Did you remember to rinse after backwashing and before going back to filter mode?
    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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    Nov 2014
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    Re: Newbie backwash mistake

    Nope. I didn't rinse. Guess I didn't know i needed to. How do you rinse?
    35k in ground plaster pool, Pentair FNS Plus 48 DE Filter

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    Richard320's Avatar
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    Jan 2010
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    San Dimas, CA (LA County)
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    18,768

    Re: Newbie backwash mistake

    If you have a multiport valve, you set it to Rinse. If all you have is a push-pull valve, you just need to make sure you run it long enough to really flush the grids off completely. Myself - after the first minute, I shut it off and open the air bleed and let the filter drain out the backwash hose. Then I remove the clamp, close the air bleed, close the valve, cycle it for a split second to pop the lid loose, and then open it up and hose the grids off with a jet stream of water. Reassemble, and then resume the backwash.

    As to the original question: vacuum the sludge up. With crystal-clear TFP pool water, you can see every speck of dirt. It will bug you if you let it settle out into drifts.
    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!

  5. Back To Top    #5

    Join Date
    Nov 2014
    Location
    Dallas, TX
    Posts
    14

    Re: Newbie backwash mistake

    Thanks so much!! I appreciate the quick answers. I will vacuum it up next week.
    35k in ground plaster pool, Pentair FNS Plus 48 DE Filter

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