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Thread: Should I backwash in low speed?

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    guamguy's Avatar
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    Feb 2010
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    Should I backwash in low speed?

    Just wondering if this can be done. I can get the pump to prime in low (takes a bit of work). The reason I'm asking is that I haven't received the speed control switch I ordered yet, and I temporarily wired the pump for low speed operation while waiting for the motor
    end-cap/switch to show up in the mail. Sorry for asking so many questions about pumps, but swapping out the old motor for a 2-speed gives me another "toy" in the pumphouse to play with
    12,800 gallon IG plaster kidney-shaped pool, waterslide, 800 gallon spa.
    1HP 2 speed Sta-Rite pool pump, 1.5 HP Sta-Rite spa jet pump. 2 skimmers, 1 main drain
    Purex-Triton TR-60 325 lb.sand filter. 2" Plumbing, Intex SWCG, TF-100 test kit.
    Link to pics of my pool! http://www.troublefreepool.com/my-oasis-t26558.html

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    duraleigh's Avatar
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    Re: Should I backwash in low speed?

    No harm in trying but I doubt it will be very effective. Just guessing, but I would think you need all the water velocity you can muster to dislodge the dirt and push it up and away from the sand.

    Again, no damage possible that I can think of but it would certainly be less effective and perhaps enough less to not make it worthwhile.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Should I backwash in low speed?

    I agree with Duraleigh, probably just a waste of water as you won't lift the sand bed enough to expand it and wash off the dirt. rule of thumb if possible backwash at twice the filtration rate.

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    guamguy's Avatar
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    Re: Should I backwash in low speed?

    Sounds like a plan, I'll just wait until I have the ability to easily switch between high and low speed.
    Thanks for the replys
    12,800 gallon IG plaster kidney-shaped pool, waterslide, 800 gallon spa.
    1HP 2 speed Sta-Rite pool pump, 1.5 HP Sta-Rite spa jet pump. 2 skimmers, 1 main drain
    Purex-Triton TR-60 325 lb.sand filter. 2" Plumbing, Intex SWCG, TF-100 test kit.
    Link to pics of my pool! http://www.troublefreepool.com/my-oasis-t26558.html

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