Should PEX spin?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by kokopup, Nov 13, 2004.

  1. kokopup

    kokopup New Member

    Oct 11, 2004
    We gutted house and had plumber put in all new plumbing (PEX pipe and all rough-ins). I'm installing fixtures now. I noticed that the PEX stub-outs from the wall "spin.," that is, they rotate when turned. There doesn't appear to be a leak at joint (as best as I can tell--it's covered by drywall), but should it spin like this? Makes me wonder if copper crimp rings were properly installed.
  2. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    I do not use PEX, so I cannot tell you for certain, but given the way PEX fits onto the fittings, and the way a proper crimp should be made, I would doubt that it could be loose enough to spin. I will be interested to see what PEX installers say about it. I they say it is a common thing, then I guess my decision not to use PEX may have been the right one.
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  4. TickMan

    TickMan New Member

    Nov 15, 2004
    Our new cabin was done with PEX, and I noticed that the sink valves rotated on the PEX. Our plumber said it was perfectly OK, and he's been doing PEX exclusively for some time.
  5. loFreqncy

    loFreqncy New Member

    Aug 1, 2008
    First off, I'm no pro (far from it).

    That said, I replaced all the supply pipe in my house with PEX(the galvanized was leaking and I could not afford a plumber). All the crimps I made checked out perfect with the gauge, and yes they "spin". I wondered about this too, but I've never seen a drop come out of them.
  6. patrick88

    patrick88 Plumber

    Sep 3, 2007
    Webster Ma.
    Yes they will spin. All the pex fittings I have done can and will spin. It is much like well tubing. If you tighten the clamps down you can still spin the fittings. I would rather not have pex as a stub out. I would use copper sticking out the wall or some else less flimsy.
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    There are some really robust stubouts for pex made of copper that allow you to install conventional compression shutoff valves without hassles, and those will be tight. You can use the same compression shutoff on pex, but you MUST use the (typically) stainless steel bushing inside of the pipe to give it something robust to compress onto. A compression shutoff installed in this manner can still be spun, but it will be hard.
  8. Redwood

    Redwood Master Plumber

    Dec 15, 2007
    Service Plumber
    PEX connectors will turn and it is normal.
  9. nhmaster

    nhmaster Master Plumber

    Jul 30, 2008
    Tech. Instructor
    S. Maine
    Some spins more than others. I find Wirsbo / Uponor spins easier than Viega and ss rings. But yes it will and unless you see leakage it's OK.
    Last edited by a moderator: Oct 18, 2008
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