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Thread: Backwash question

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    Join Date
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    Backwash question

    I have a Jandy 580 CV cartridge filter and recently plumbed a valve in place of the solid drain cap at the bottom of the filter. Would opening this valve while the pump is running "backwash" the filters?
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Richard320's Avatar
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    Re: Backwash question

    No, that would be more of a waste setting. The drain is on the dirty side of the filter. So all you'd do is pump water out of the pool, through the pump and out the filter drain.

    Backwashing is flow reversal. You can't do that with a cartridge filter.
    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: Backwash question

    Gotcha. There have a been a few times where I have had to vacuum when it was extremely dirty. By opening the valve, would it be "vacuuming to waster" and sending all that was vacuumed up directly out?
    35,049 gal in ground free form pool, Jandy CL580 Cartridge filter, Jandy SHPF2.0-0 pump, Chlorine

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    Richard320's Avatar
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    Re: Backwash question

    Quote Originally Posted by tobydog View Post
    Gotcha. There have a been a few times where I have had to vacuum when it was extremely dirty. By opening the valve, would it be "vacuuming to waster" and sending all that was vacuumed up directly out?
    Most. Maybe all, if the filter was really dirty. It just depends on the resistance on each path -- out the drain or through the filter and back to the pool.

    If you're vacuuming up big gobs of stuff, remember it can clog the pump basket and/or slip through and clog the impeller. The basket's easy to remedy. The impeller, not so much.
    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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