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Thread: Backwash

  1. Back To Top    #1

    Join Date
    May 2015
    Burlington, Wa


    Im in my 2nd day of slam, the filter needs backwashing, PSI is 10 pounds above avarage, filter housing at pump can only fill halfway with water.

    Do I leave it because a dirty filter cleans better or backwash to get more water flow?

    Thanks wgcole
    22,000 Inground, 8' deep,Diving board,Slide,Tagelus Deluxe TA-60D, 3/4 HP pump, Teledyne Laars 250,000 BTU Heater, Heliotrope General Model HM4000A Heating Collectors

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Backwash

    You should always backwash when the pressure rises 20-25% over the clean pressure ... waiting for a 10 psi rise is way too long.
    Jason, TFP Moderator
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  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Backwash


    We don't know what your normal pressure is, but we recommend backwashing when it goes up 25%. I seriously doubt your filter runs above 40 psi normally. So it's time to backwash.
    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.
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