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Thread: pex to copper fixture stub outs

  1. #1
    DIY Member remodelbob's Avatar
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    Default pex to copper fixture stub outs

    what is the best method to stub out a pex supply line?

    i was planning on using some of these pex to copper ells



    but I was wondering what the best way to secure them is? should i run some blocking behind them and strap to it and then put one of those copper plates with all the holes in front of it?

    i have also seen some of those ells with a nailing plate on them, is that a better solution?

    Terry, you seem to always have the perfect picture for these things. Do you have an example of a pretty PEX stubout?

    Thanks.
    Rob

  2. #2
    Rancher
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    That picture brings up a question... do you need any water hammer arrestors when using PEX?

    Rancher

  3. #3

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    Probably the ideal way is to use a copper stub bracket and solder the stubouts to it.


  4. #4

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    Quote Originally Posted by Rancher
    That picture brings up a question... do you need any water hammer arrestors when using PEX?
    No - the plastic pipe is noise-limiting and absorbs the pressure variations.

  5. #5
    DIY Member remodelbob's Avatar
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    Quote Originally Posted by Herk View Post
    Probably the ideal way is to use a copper stub bracket and solder the stubouts to it.

    Should I also strap the ell to some blocking or will the bracket be enough?

    Thanks

  6. #6
    Retired Defense Industry Engineer jadnashua's Avatar
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    You may have missed the suggested step...solder the el to the bracket. That should be plenty to hold it in place.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  7. #7
    Forum Admin, Expert Plumber Terry's Avatar
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    No - the plastic pipe is noise-limiting and absorbs the pressure variations.
    The PEX is quiet and absorbs shock.
    My inspectors still like to see arrestors on washers, dishwashers and icemakers if they system is closed.

    Closed would be if there is a PRV on the line, or a check valve, which the city sometimes puts at the water meter.

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