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Thread: Pentair Buttress Thread Closure Replacement Kit?

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    Pentair Buttress Thread Closure Replacement Kit?

    The top of my pentair sand filter is leaking, so I purchased a thread closure replacement kit.

    The instructions are unclear on what I need to do when replacing.

    -Do I use silicone on the rubber gasket?
    -Do I need to use pipe dope on the clear top piece that screws in (houses the pressure release and gauge)?
    -Anything else?
    35k gal, sand, IG, diamond brite, Hayward Goldline T-CELL-15 Turbo SWG, Aquarite, Compool Lx3600

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    Richard320's Avatar
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    Re: Pentair Buttress Thread Closure Replacement Kit?

    I haven;t got a clue, but I'll give you a in case someone else does.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    Re: Pentair Buttress Thread Closure Replacement Kit?

    Use silicone lube on the o-rings.

    Note that there are two types of threads. There is a "V" thread and a buttress style thread. The "V" threads are triangular, whereas the buttress thread is flat on one side and angled one the other. They are not interchangable.

    Triton filters manufactured after After Dec. 1, 1991 use the buttress style.

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    Re: Pentair Buttress Thread Closure Replacement Kit?

    Gotta ask, Dagobah. Are you a Star Wars fan with a name like that?

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    In the Industry

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    Re: Pentair Buttress Thread Closure Replacement Kit?

    Use silicone lube for the orings and top fittings, although you can also use pipe dope and Teflon tape as well

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    Re: Pentair Buttress Thread Closure Replacement Kit?

    Quote Originally Posted by JamesW View Post
    Use silicone lube on the o-rings.

    Note that there are two types of threads....

    Triton filters manufactured after After Dec. 1, 1991 use the buttress style.
    Thanks a ton. This appears to be a '01 so I should be good.

    Quote Originally Posted by MarianParoo View Post
    Gotta ask, Dagobah. Are you a Star Wars fan with a name like that?
    Hah, yup!

    Quote Originally Posted by OldPoolMan View Post
    Use silicone lube for the orings and top fittings, although you can also use pipe dope and Teflon tape as well
    Thanks! Super easy fix. Replaced the part in 5 minutes, all seems to be running with no leaks.


    35k gal, sand, IG, diamond brite, Hayward Goldline T-CELL-15 Turbo SWG, Aquarite, Compool Lx3600

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