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Thread: Brass Unions

  1. #1
    DIY Senior Member BimmerRacer's Avatar
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    Default Brass Unions



    Do I need to put anything between two halves or do I just crank it down to seal it?

  2. #2
    Illinois Licensed Plumber SewerRatz's Avatar
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    Just tighten them down the ground face of the union will make the seal.

  3. #3
    DIY Senior Member BimmerRacer's Avatar
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    Thanks Ron!

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
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    A couple of things...make sure the pipes are aligned when you tighten things up. And, especially if you overtighten, you may find you create a ridge on the sealing surfaces, so if you need to tak it apart, it becomes more difficult to seal unless you get it aligned perfectly.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  5. #5
    Moderator & Master Plumber hj's Avatar
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    Default unions

    I usually use pipe joint compound on the faces and the threads of the union nut to give some lubrication to the process.

  6. #6
    Master Plumber-Gas Fitter shacko's Avatar
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    Default Unions

    Do to the fact that most fittings are made off planet, I also use a little pipe compound on the face, your choice.

  7. #7
    DIY Senior Member BimmerRacer's Avatar
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    Thanks for the tips gents

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