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Thread: NPT vs slip fit diverter handle spout

  1. #1
    DIY Junior Member leorob's Avatar
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    Oct 2009
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    Los Angeles
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    Default NPT vs slip fit diverter handle spout

    I will be installing a Kohler 3 handle shower/tub Valve (K-303-K).
    I have a choice of NPT or slip fit hardware. (K-T15231-4S or K-T15231-4).

    I need help in deciding between the NPT and the slip fit.
    Pros and Cons of each?

    Thanks

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    Sep 2004
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    New England
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    21,434

    Default

    It's much easier to get the slip-fit unit to snug up to the wall, and should work fine. But, if you use copper and tighten the set screw too tight, you can bend the pipe and give you grief later on.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    Moderator & Master Plumber hj's Avatar
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    Aug 2004
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    25,679

    Default spout

    slip fit is easier to install and replace, IF the pipe is absolutely square to the wall. Otherwise you will always have a gap somewhere.

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