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Thread: Drain DE filter?

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    Join Date
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    Drain DE filter?

    Would it be beneficial to drain the dirty-water from the pressure-side of a PLD70?

    Dynamic pressure is 4-psig, so media replacement is not warranted.

    Thanks!

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    Mod Squad Bama Rambler's Avatar
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    Re: Drain DE filter?

    Do you have a 2-speed or variable speed pump?
    What rpm is that pressure at?

    It's usually not required to do anything to the filter until it's time to clean it. Then you clean and recharge it.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Drain DE filter?

    Thank you for your interest.

    Filter-pressure is 4-psig when the pump is rotating at 3450-rpm. Have ordered a replacement pressure-gauge. Motor is a single-speed 'special-purpose' model by Emerson, rated 1-hp, and drawing less than half of the rated-current. The impeller is rated for 3/4-hp, and the piping is 2-inch throughout.

    Planed to drain the filter while the pump was not running. Filter is performing well, but the pressure-side water is quite turbid, and has a greenish color.

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    Mod Squad Bama Rambler's Avatar
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    Re: Drain DE filter?

    Sounds like you have algae starting. You need to shock.
    can you provide us a full set of test results?
    pH
    FC
    CC
    TA
    CH
    CYA
    Salt
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Drain DE filter?

    FC = 2.5, CC = 0.2, KH = 120, GH = 290, CYA = 50, NaCl= 580

    Concrete pool, Chlorinated by Tri-Clor generator. Shock with Hypochlorite & Muriatic Acid.

    Concur with you about the alga as Clorine-consumption has been high for three-days.

  6. Back To Top    #6

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    Re: Drain DE filter?

    Welcome to TFP!!

    I'm wondering if you have a clogged impeller or suction line obstruction. Either of these would cause a low psi reading on your gauge, as could a clogged pump basket.

    If it was the filter, your psi would rise, not get lower.

    Thank you for the detailed posts
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

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