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Thread: PB to PEX adapter and crimping

  1. #1
    DIY Junior Member trewq's Avatar
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    Default PB to PEX adapter and crimping

    I have the gray PB pipes and need to transition to PEX.

    The Polybutylene to PEX adapter fitting comes with a copper colored crimp ring for the PB side and a black crimp ring for the PEX side.

    Can I use the same 1/2" rental crimp tool (which says its for PEX) for both rings or do I need a PB crimp ring tool as well?

    I have had different answers from different people and would like clarification.

    Thank you.


  2. #2
    In the Trades Jerome2877's Avatar
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    Yes you use the same tool.

  3. #3
    DIY Junior Member trewq's Avatar
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    Why are the crimp rings different? They look to be the same size & thickness.

    What would happen if you used a black one on the PB side or the copper colored one on pex?

  4. #4
    In the Trades Jerome2877's Avatar
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    I don't know, never tried it. Maybe the hardness of the ring is different?

  5. #5
    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    There both copper and the same size. Don't know the reason why one is painted black. I guess it's so the can call it a PEX ring instead of a POLY ring.

    John

  6. #6
    Moderator & Master Plumber hj's Avatar
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    The black one should be just slightly different

  7. #7
    VP at Dahl Brothers Canada Limited Dahlman's Avatar
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    Quote Originally Posted by hj View Post
    The black one should be just slightly different
    hj is correct. I don't have the dimensional specs nearby but I know that they are definitely different because I looked into this very question 2 years ago. I would NOT interchange them.

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