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Thread: filter backwashing frequency

  1. Back To Top    #1

    Join Date
    Mar 2008
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    Lake Forest, CA
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    110

    filter backwashing frequency

    Hi folks,

    I have a 60 sq. ft. Jandy DE filter, and I take it apart every 6 months and clean everything out and replace the DE. My question is, if the pressure gauge never goes more than a pound or two higher than the "clean" setting between my 6-month cleanings, is there any reason that I should ever backwash it at all? I guess if I were to get a major algae bloom and had to vacuum up a bunch of dead algae or something like that, I would backwash it, but if everything is in pretty good shape between cleanings and the pressure hardly raises on the gauge, I'm tempted to not bother with any backwashing in between cleanings. Is this OK?

    Thanks,
    Greg
    12000 gal IG pool/spa combo,60 sq ft Jandy DEL filter,2 hp Jandy Stealth pump,Jandy LX400 400K BTU gas heater,Pentair Rainbow 300 off-line feeder (never gets used),Jandy Aqualink RS4 with PDA remote,3 Jandy 12" sheer descent waterfall features, Dolphin Oasis Z5 robotic cleaner

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    JasonLion's Avatar
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    May 2007
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    Silver Spring, MD
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    Re: filter backwashing frequency

    Since the pressure isn't rising significantly, you are fine doing what you are doing.
    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

  3. Back To Top    #3

    Join Date
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    Virginia Beach, VA
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    Re: filter backwashing frequency

    That's awesome if you're able to keep the back pressure that low for extended periods of time. How old is the filter? Are you sure you don't have any holes in any of the grids? You'd probably know if you did since it sounds like you clean often. You probably would have seen them or you probably would have noticed the DE coming out of your returns when trying to recharge and/or reduced filtering effectiveness.
    Andrew - Virginia Beach, VA
    22,000 gallons; 16x32 rectangle; 3.5Ft-8Ft Depth; Pentair Whisper Flow 2 speed Pump 1.5/.5HP; Pentair FNSP60 DE Filter; Aqua Rite SWG. Polaris 180 cleaner.

  4. Back To Top    #4
    JasonLion's Avatar
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    May 2007
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    Re: filter backwashing frequency

    If you get an oversized filter, it is easy to run that long between cleanings.
    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

  5. Back To Top    #5

    Join Date
    Mar 2008
    Location
    Mansfield, Tx
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    Re: filter backwashing frequency

    My PB was a former Aerospace Engineer and is always looking for a better way, he was insistent that I don't backwash but clean my filter and replace the DE when the pressure got high, he said it would be probably twice a year and that's what it has worked out to. He thought that backwashing was the "lazy guy's" way and did a poor job of cleaning the filter. Most pool owners I talk to give me strange looks when I tell them this, but I have become a big beliver in the "no backwash" philosophy and my pool sparkles.
    16K Gunite, Spa w/ Waterfall
    Beadcrete Plaster. (3) Shear Decents
    Jandy 60 Sq ft DE Filter
    (2) Jandy Stealth 2.0 HP Pumps
    AquaPure SWG w/ PDA
    (5) Returns, (2) Floor Drains, (1) Skimmer
    LXi Heater, Letro Platium Cleaner w/ Booster Pump

  6. Back To Top    #6

    Join Date
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    Central Texas
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    Re: filter backwashing frequency

    I backwash most of the year, but FAR less frequently since I added borates to the pool. Perhaps every 2-3 months now, vs. every 2-4 weeks before. During the cold months I haven't had to backwash at all. Once each year, in the spring, I open the housing and clean everything very well in preparation for swim season. The water indeed sparkles, and has been like that since the week I added the borates. 8)
    26,000 Gallon Gunnite IGP
    2 HP Challenger High Head Pump
    60sf Nautilus DE filter
    Polaris 280

  7. Back To Top    #7

    Join Date
    Mar 2008
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    Lake Forest, CA
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    110

    Re: filter backwashing frequency

    Thanks all for the responses. I'll just keep to my 2x per year cleanings and enjoy the fact that I don't need to backwash in between (unless, of course, something out of the ordinary comes up). achristie, my filter is about 2 1/2 years old, and it appears that nothing is coming back in through the pool returns. I think I just have an oversized filter for my pool, so cleaning it twice a year is enough without any backwashes in between.

    Greg
    12000 gal IG pool/spa combo,60 sq ft Jandy DEL filter,2 hp Jandy Stealth pump,Jandy LX400 400K BTU gas heater,Pentair Rainbow 300 off-line feeder (never gets used),Jandy Aqualink RS4 with PDA remote,3 Jandy 12" sheer descent waterfall features, Dolphin Oasis Z5 robotic cleaner

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