Connecting Vanity drain to Unthreaded metallic drain pipe sticking out of the wall...

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by BrianBrian, Sep 15, 2013.

  1. BrianBrian

    BrianBrian New Member

    Messages:
    4
    Location:
    Virginia
    Hi,

    This is one of the times I could kick myself.... I wish I had taken pictures of the old vanity and connections before I threw them out, so now I had a way to put things back together! :D

    The picture I have attached should show it all. I have inserted a 1 1/2" slip joint connector in the drain pipe sticking out of the wall to help show the exact dimension of it. The drain pipe coming out of the wall is not threaded, either.

    The 1 1/2" drain pipe assemblies I find at my local Home Improvement center all expect threaded connections coming out of the wall.

    I had found a 1 1/2" slip joint coupling at my local home improvement store and thought of using it. However, the drain pipe's diameter is too large and the coupling does not slip on...

    Thank you for your help.

    Attached Files:

  2. Terry

    Terry Administrator Staff Member

    Messages:
    14,783
    Location:
    Bothell, Washington
    If that's copper coming out of the wall, Nibco makes a sweat on trap adapter.

    [​IMG]

    Or you may need to go with coupling with hose clamps.

    They also make "Marvel" rings that can be soldered on.

    [​IMG]
    Marvel Ring
  3. BrianBrian

    BrianBrian New Member

    Messages:
    4
    Location:
    Virginia
    Thank you, Terry. What size trap adaptor do you believe would work?! I am thrown off by the fact that the existing drain pipe (which I thought was 1 1/2") is a bit too wide for the 1 1/2" slip joint coupling I found and also can take in the 1 1/2" slip joint connector pipe (as in the photo)... Do you think the 1 1/2" trap adaptor would work?

    It still make me wonder what used to be there?! It wasn't definitely a fernco coupling. But, for the life of me, I can't remember exactly how it was done.
  4. Terry

    Terry Administrator Staff Member

    Messages:
    14,783
    Location:
    Bothell, Washington
    Slip joint couplings are a smaller dimension. A 1.5" p-trap will fit "into" a standard sized DWV pipe.
    So if you have 1.5" copper from the wall, it's OD will be 1-5/8" and the ID will be 1.5"
    A sweat on marvel ring or sweat on trap adapter will be made for 1.5" copper pipe.

    When the trap adapter is installed, the trap will slide into the wall pipe, and snug up with the slip joint connection.
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