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Thread: Small leak in filter drain

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    Join Date
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    Small leak in filter drain

    Is "filter drain" the correct term for the pipe the water comes out of when you backwash or rinse? That is the pipe I am asking about.
    There is a small amount of water coming out of it when I am filtering. It is about 1 cup every 2 hours, or 3 quarts a day. How much of a problem is this? Does it need to be fixed? I had the filter valve replaced just a few months ago.
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

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    Mod Squad jblizzle's Avatar
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    Re: Small leak in filter drain

    Sounds like a seal in the filter valve is leaking. Do you have the push/pull type or the multi-valve? The seals in either are replaceable.

    Ideally I would want it fixed, but the leak rate is pretty slow. Although, it could get worse is the seal gets more messed up every time you use it.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Sep 2011
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    Re: Small leak in filter drain

    It is something like this
    Hayward Pro Series Vari-Flo Top-Mount Control Valve, Black
    http://www.amazon.com/Hayward-SP0714T-V ... 217&sr=8-1
    36 x 18 oval pool, inground, plaster pool.
    27000 gallons
    1 hp pump. Sand filter
    Pool built in 1971.

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    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
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    Tucson, AZ
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    37,389

    Re: Small leak in filter drain

    You should be able to remove the 6-8 screws from the top and inspect the spider gasket inside for damage. Apparently some of the newer designs have the gasket attached to the plastic plate and you have to replace that plate/gasket combo instead of just the rubber gasket.

    If you switch the valve to Recirculate, does water still come out? Or if you move the valve around (like after backwashing) does the leak rate stay the same when you return back to filter? Mine sometimes does not fully seat unless I wiggle it a bit and I get a LOT of water out the backwash when I thought it was set to filter.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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