Shower Valve Body Installation (NPT)

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by hans_idle, Jan 24, 2008.

  1. hans_idle

    hans_idle New Member

    Messages:
    51
    Location:
    Princeton Junction, NJ
    This seems like such a simple problem, but I'm at a loss as to how to deal with it.

    My wife just purchased a Jado shower head and valve body (pressure balanced). The inlets and outlet are 1/2" NPT. How the heck do I thread the copper supply pipes onto this? The supply line is always going to be immovable.

    The supply lines are fixes in place, so they can't turn. If I thread-on an adapter and then solder to the copper pipes, how do I know if I've gotten the adapter tight enough? I'd have to turn the water on to find out, and by then it's too late.

    What am I missing? This seems like such a simple issue, given that a lot of valve bodies come with this type of hookup.

    -Hans
  2. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,331
    Location:
    Cincinnati OH
    Solder pipe to adapter
    mount faucet
    install adapters w/pipe to faucet
    then pipe to faucet.
    Last edited by a moderator: Jan 24, 2008
  3. hans_idle

    hans_idle New Member

    Messages:
    51
    Location:
    Princeton Junction, NJ
    Thanks. I had done a search here, but my search terms were too vague and I got too much info. A search on the internet yielded a few clues that agree with what you listed.

    I suppose the key is knowing how tight to make the connections to the valve body, and making sure to use pipe compound.
  4. Terry

    Terry Administrator Staff Member

    Messages:
    14,775
    Location:
    Bothell, Washington
    For thread sealant, I like something like rectorseal with Teflon paste.
    The trouble with tape is that heating the pipe a ways a way can affect it.
    When threading a MA into a valve, I crank it in pretty darn good.
  5. remodelbob

    remodelbob New Member

    Messages:
    59
    Location:
    Washington
    can't you also slip 1/2" copper into the shower valve and just solder it on there?

    i know the kohler ones work like that. you can either use the npt or solder.
  6. hans_idle

    hans_idle New Member

    Messages:
    51
    Location:
    Princeton Junction, NJ
    For some reason, Jado builds their faucets to NOT allow the soldering on the inlets and outlets. You can't fit the 1/2" inside and it specifically says not to try it.
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,814
    Location:
    New England
    The quality of the threaded fittings these days is often pretty crappy. It might be worth paying the extra for a brass one if you can find one with nice clean threads.
  8. hans_idle

    hans_idle New Member

    Messages:
    51
    Location:
    Princeton Junction, NJ
    I'll look for brass. Any issues with soldering copper to brass? I've done it before, just not sure if i've done it right :D
  9. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,814
    Location:
    New England
    Copper solders just fine to brass...
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