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Thread: water coming out of backwash valve question.

  1. #1
    Junior Member
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    Jul 2010
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    col. Ohio
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    water coming out of backwash valve question.

    Hi all, I gues this is a 2 prt question. first, the filter is 2 yrs old. water comes out the backwash valve when running. it's fine if in the recirculate position. but I guess thats not filterng the water, just keeping it moving, right? Why would it do that?
    Second.. would this cause no pressure during backwashing?
    How is this fixable?
    thanks
    10,000 gal. above grnd.
    300 # sand filter
    solar cover(do not use often)

  2. #2
    Mod Squad Bama Rambler's Avatar
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    Jun 2009
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    SouthWest Alabama
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    Re: water coming out of backwash valve question.

    You're describing a leaking spider gasket in the multiport valve. They're pretty easy to change. And yes, that would cause the pressure to be low when in backwash too.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 1.5hp Dynamo pump. 24" Pentair Sand Dollar Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit
    You can stop SLAMing your pool when you pass the OCLT (You lose 1ppm or less FC overnight, & You have .5ppm CC's or less) & your water is clear.

  3. #3
    Junior Member
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    Jul 2010
    Location
    col. Ohio
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    Re: water coming out of backwash valve question.

    thanks for your help. Even tho its only 2 yrs old this would happen? would this be something easier bought online or pool store. I have found that online is cheaper than store?
    10,000 gal. above grnd.
    300 # sand filter
    solar cover(do not use often)

  4. #4
    Member Articfox918's Avatar
    Join Date
    May 2012
    Location
    Western, Wisconsin
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    99

    Re: water coming out of backwash valve question.

    Do you shut off your pump when switching the valve? This can mess things up if you are trying to change position on the valve with the pump running.
    POOL SIZE: 27 FT round 52" Deep on edges 66" Deep in center
    FILTER TYPE: Hayward Sand Filter
    PUMP SIZE: Hayward 1 HP Pump 60GPM
    FILTER SIZE/FLOW RATE: Unknown
    HEATER: None at the moment but in process of making my solar panels should be operational by next season!

  5. #5
    Senior Member GreatCanadian's Avatar
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    Jul 2011
    Location
    St. John's, Newfoundland
    Posts
    810

    Re: water coming out of backwash valve question.

    My filter exhibited the exact symptoms as yours - water coming out of the drain port when it shouldn't. As Bama said, it was my spider gasket. My filter was 1 year old.
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

  6. #6
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    20,953

    Re: water coming out of backwash valve question.

    The biggest difference between buying it online and the pool store is that you can take the old one to the pool store to make sure it fits before hauling it home. You can't do that online.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 1.5hp Dynamo pump. 24" Pentair Sand Dollar Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit
    You can stop SLAMing your pool when you pass the OCLT (You lose 1ppm or less FC overnight, & You have .5ppm CC's or less) & your water is clear.

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