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Thread: drain fitting problem

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    Join Date
    May 2010
    Location
    Northern VT
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    drain fitting problem

    I just got a new above ground pool and this site has been a great help to me since I ran across it a couple weeks ago. Unfortunately, my first post is asking for advice on a problem.

    New 24' pool was installed 2 days ago. Pool was 2/3 filled and the filter and pump were hooked up but still dry when the installers left. We filled the pool, and I found that the sand filter was leaking at the drain fitting. Filter is a STA-RITE T-210WF. I hand tightened the drain cap as much as I dared to but it still leaked. So I drained the water and removed the cap. The threaded male fitting on the filter housing is not squared off, and a white pipe sticks out ~1/16" past the end of the fitting. Either the o-ring doesn't seat well enough because the fitting is so uneven, or that pipe doesn't allow the cap to close down. Or both...

    Any opinions on how clean these fittings should be on a new filter? I'm torn between filing it down myself to get the drain cap to seat properly, and being a PITA until the pool store sends installer back to replace the filter.
    Summer: 19 x 37 Pacific Graphex IG modified oval, aztec marine vinyl liner, 24,000 gal, 3.5 feet to 8 feet, 1 hp Hayward C4025 Swim Clear 4-cartridge filter, chlorine pucks or bleach depending on CYA levels, 1 super wide mouth skimmer, 4 returns (2 therapy jets in steps), Hayward pool vac ultra, Hayward Heat Pro heat pump, non-curved pool slide, 6' jump board, 12 ml clear solar cover, TF-100 test kit, added salt for feel 1,250 ppm, we had "pink algae" in 2010.
    Winter: Hot Springs Vista Spa, 500 gallons. Using BBB method for the first time and for the first time in ages, the water is crystal clear

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    duraleigh's Avatar
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    Apr 2007
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    Re: drain fitting problem

    gb3,

    Welcome! The forum is all about helping solve problems.

    I'm not familiar with that fitting. Others probably are and will chime in soon. Short of that, a pic will help a lot.

    Just a thought, could it be as simple as using pipe dope on the threads?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

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    May 2010
    Location
    Northern VT
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    Re: drain fitting problem

    pic attached. The o-ring is same diameter as the threads on the fitting. The o-ring looks fat enough that the white pipe shouldn't interfere, but I dunno. This seal depends on the o-ring in the cap squishing down neatly on the flat flange part of the fitting. I tried trimming the uneven threads back, but still couldn't tighten that thing down enough to keep it from leaking.

    \edit - for scale: the male fitting is 2" across
    Attached Images Attached Images
    Summer: 19 x 37 Pacific Graphex IG modified oval, aztec marine vinyl liner, 24,000 gal, 3.5 feet to 8 feet, 1 hp Hayward C4025 Swim Clear 4-cartridge filter, chlorine pucks or bleach depending on CYA levels, 1 super wide mouth skimmer, 4 returns (2 therapy jets in steps), Hayward pool vac ultra, Hayward Heat Pro heat pump, non-curved pool slide, 6' jump board, 12 ml clear solar cover, TF-100 test kit, added salt for feel 1,250 ppm, we had "pink algae" in 2010.
    Winter: Hot Springs Vista Spa, 500 gallons. Using BBB method for the first time and for the first time in ages, the water is crystal clear

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: drain fitting problem

    Try wrapping the threads on the plug with teflon plumbers tape before inserting.
    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

  5. Back To Top    #5

    Join Date
    May 2010
    Location
    Northern VT
    Posts
    3

    Re: drain fitting problem

    I trimmed off the burrs on the end of the threads, and now the drain seal holds tight. Running the filter with no problems so far (knock on wood).
    Summer: 19 x 37 Pacific Graphex IG modified oval, aztec marine vinyl liner, 24,000 gal, 3.5 feet to 8 feet, 1 hp Hayward C4025 Swim Clear 4-cartridge filter, chlorine pucks or bleach depending on CYA levels, 1 super wide mouth skimmer, 4 returns (2 therapy jets in steps), Hayward pool vac ultra, Hayward Heat Pro heat pump, non-curved pool slide, 6' jump board, 12 ml clear solar cover, TF-100 test kit, added salt for feel 1,250 ppm, we had "pink algae" in 2010.
    Winter: Hot Springs Vista Spa, 500 gallons. Using BBB method for the first time and for the first time in ages, the water is crystal clear

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