Installing Moen A725 series Drop Ell

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by HalM, Nov 8, 2019.

  1. HalM

    HalM New Member

    Joined:
    Sep 17, 2019
    Location:
    Ottawa, ON
    Soon I will be installing a Moen A725 series Drop Ell to go along with a moen handshower slidebar assembly.
    My model has the threads inside the drop ell. Is there a preferred length of pipe to use for this item? I'm finding it a bit tricky to know how deep to mount the drop ear inside my wall, before I start closing in the wall to do tile work. I do have the Moen specs that showing that 3/8" of the pipe is to be extended beyond the finished wall. It doesn't seem like very much to grab on to and tighten the pipe and risk damaging the threads.

    Also, what would be the preferred type of pipe to use for this installation? It will be attached to a 1/2" Brass drop ear.

    Thanks for the help.
    Hal
     
  2. Tuttles Revenge

    Tuttles Revenge In the Trades

    Joined:
    Oct 15, 2014
    The only 2 adjustment you have with this Elbow is how many threads you tighten it on the pipe nipple and how long of a pipe nipple you use. Pipe nipples come in varying lengths spaced by 1/2" increments. If you can assemble it prior to rough in installation, you can get a sense for how deep to place your threaded elbow in the wall. But variations in wall plumbness and tile depth, make any precise measurments difficult at best.

    Some tricks to adjusting depth via threads and tightness are involved in applying more or less wraps of PTFE tape on the pipe nipple so it bottoms out sooner or less to have the thread go further in.
     
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  4. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    Us a brass nipple for that.
    You stub out for now with a 6" nipple and cap until you are ready for installation. After tile, mark the nipple at 3/8" from the tile, remove the nipple, and get your measurement.
     
  5. HalM

    HalM New Member

    Joined:
    Sep 17, 2019
    Location:
    Ottawa, ON
    If the proper size nipple is installed after the the wall is finished, what's the best way to tighten it without damaging the threads?
     
  6. Reach4

    Reach4 Well-Known Member

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    Location:
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  7. Tuttles Revenge

    Tuttles Revenge In the Trades

    Joined:
    Oct 15, 2014
  8. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    I put the nipple on the drop ell and then use a screwdriver in the hole that is for the shower hose to turn the drop ell. I do not install the nipple to the wall first.

    Nipple in the drop ell, and then thread the whole entire mess in at one time.
     
  9. HalM

    HalM New Member

    Joined:
    Sep 17, 2019
    Location:
    Ottawa, ON
    Thank you for this info.
    Normally, how far would you assume the nipple be tightened in to get a firm seal? At least half an inch?
     
  10. HalM

    HalM New Member

    Joined:
    Sep 17, 2019
    Location:
    Ottawa, ON
  11. HalM

    HalM New Member

    Joined:
    Sep 17, 2019
    Location:
    Ottawa, ON
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