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Thread: PB to PEX?

  1. #1
    Forum Admin, Expert Plumber Terry's Avatar
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    Default PB to PEX?



    That shark bite doesn't really like the conversion here.
    Any plumbers out there that have seen this type of pipe and fitting? And how are you making the conversion?

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    In the Trades joemcl's Avatar
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    Terry sharkbte makes a transition coupling ftom poly to pex. They are a little hard to get. Either model u 4008 or u 4016. The poly side of the fitting is grey, not gold like regular sharkbite. They also make transition pex crimp fittings, that I can usually find at lowes and plumbing supply. They come with rings, but you can use the stainless cinch rings in their place.

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    Moderator & Master Plumber hj's Avatar
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    There is no reason the Sharkbite should leak, unless the tubing damaged the internal seal, or was not slid on all the way. They work with ALL the cts plastic tubing materials, including pb, PEX, and CPVC. I would be more concerned about the compression tee.
    Licensed residential and commercial plumber

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    DIY Senior Member Chad Schloss's Avatar
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    http://www.youtube.com/watch?v=HmYjHD_b410

    PB does not appear to be a CTS size and they do make a conversion coupling.

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    DIY Member DaveHo's Avatar
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    When I re-piped from PB to PEX, I used Sharkbites for temporary connections. AFAIK, the only difference in the PB Sharkbites is the size of the inner support sleeve. I believe PB has a thinner wall diameter than PEX. That said, I used normal Sharkbites as well & didn't get leaks. Not an expert by any means but I'm going to guess the PB has a nick in it or the SB o-ring got nicked.

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    In the Trades joemcl's Avatar
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    The gray end of the Sharbite if for PB


    Notice grey side of 3/4 coupling is for poly. I don't know what makes it different, only that it is, also does not leak like regular sharkbite.
    Last edited by Terry; 11-01-2013 at 03:56 PM.

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