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Thread: When and how to backwash?

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    IMXTREEM2's Avatar
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    Jun 2010
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    When and how to backwash?

    Hello!

    As some of you may know, my wife and I recently moved into a home that has a pool (details in signature). When we hooked all of the equipment up the first time, we installed the filter cartridge, sealed the filter, filled it with water, got the pump running, and we're now in the process of shocking the pool.

    Over the last two days, we've vacuumed a bunch of debris off the pool floor and I'm concerned that there is a decent amount of "gunk" in the filter at this point. I also didn't clean it prior to installing it (although it looked "ok") so I'm wondering what the best way is to go about cleaning it. Is backwashing the solution? Or, do I need to drain the filter, removed the cartridge, and spray it down w/a high powered hose?

    Also, along the same lines - what pressure should my gauge be reading? It seems very very low (like 2), but perhaps that's normal.

    Thanks in advance!
    Rich

    27' Round Johnny Weissmuller Legend Above Ground Pool
    Capacity: 17,200 Gallons
    Water Depth: 44"
    Filter: Hayward XStream Full-Flo, 150 Sq. Ft.
    Filter Type: Cartridge
    Pump: Hayward PowerFlo Matrix 1.5HP, Single Speed


    Season 3 of Jug Dumping started May 2013!
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    poolgirl22's Avatar
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    Re: When and how to backwash?

    Just FYI to those reading this thread...we've got them covered on the shocking thing in another thread.

    Backyard pool-less, but used to be.....
    16,100 gallon, 18x38 3.5 ft deep oval AG, Vinyl, Sand, 1hp pump
    http://www.poolservicestech.com Liquidator
    http://www.poolcalculator.com/
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    JasonLion's Avatar
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    Re: When and how to backwash?

    A low pressure on the gauge is normal when the pump is on low speed. You want to clean/backwash the filter when the pressure on the gauge goes up about 8 psi on high speed. If you have a cartridge filter, you open it up and spray the cartridge with a garden hose to wash all the gunk off, then put it back in.

    When shocking, it is common to have to clean the filter frequently, though that does depend on the relative size of the filter and the pool.
    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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    frustratedpoolmom's Avatar
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    Re: When and how to backwash?

    My pressure on low is about 2-3 so that sounds normal.

    Incidentally - it's never gone above 4 on low - and the guage doesn't tell me when the filter is dirty - the heater not working does. I'd say clean it on a normal basis every 4-6 weeks by hosing it off and then give it a good soak - per the instructions I gave your DW- at the end of the season.

    If you want to try to hose it off tonight that might be a good idea....
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    IMXTREEM2's Avatar
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    Re: When and how to backwash?

    Thanks guys!
    Rich

    27' Round Johnny Weissmuller Legend Above Ground Pool
    Capacity: 17,200 Gallons
    Water Depth: 44"
    Filter: Hayward XStream Full-Flo, 150 Sq. Ft.
    Filter Type: Cartridge
    Pump: Hayward PowerFlo Matrix 1.5HP, Single Speed


    Season 3 of Jug Dumping started May 2013!
    _________________

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