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Thread: 2" copper dwv in kitchen

  1. #1
    DIY Senior Member Andrew21's Avatar
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    Default 2" copper dwv in kitchen

    Hey all,
    I have a 2" dwv in my kitchen and wanted to get this setup for my new sink, and cabinets that are coming in.

    I know the usualy fittings for a kitchen sink drain is 1-1/2". So to get this to connect to the 2" copper dwv, do I:

    1. Get a 2 in. x 1-1/2 in. Copper DWV CxX coupling and put on a trap adapter?

    http://www.homedepot.com/p/Mueller-S...7073/100132768

    or

    2. get a 2" reducer to 1-1/2" and put a trap adapter at the end of this?

    THank you!

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    Normally a kitchen trap arm is 1.5"
    If you have a 2.0" trap arm, it will need to be reduced to 1.5" and a trap adapter.



    This is 1.5" copper DWV, from and old 60's home. They also make couplings that transition between copper and plastic.

  3. #3
    Moderator & Master Plumber hj's Avatar
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    If I read your question correctly, both of those fittings are the same, but you can do it almost anyway you want to as long as you wind up with a 1 1/2" connection to the sink.
    Licensed residential and commercial plumber

  4. #4
    DIY Senior Member Andrew21's Avatar
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    Thank you Terry and HJ! I'll post pics when I can.

  5. #5
    DIY Senior Member Andrew21's Avatar
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    Hey guys,
    Ok, so I was successful in getting a copper 2"x1-1/2 reducer. Now when I put the 1-1/2 trap adapter to the reducer size, its the same size and it won't fit. Did I buy the wrong piece?
    Last edited by Andrew21; 03-05-2014 at 10:14 PM.

  6. #6
    Moderator & Master Plumber hj's Avatar
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    No, you need a short length of 1 1/2" copper to go between the two pieces.
    Licensed residential and commercial plumber

  7. #7
    DIY Senior Member Andrew21's Avatar
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    Quote Originally Posted by hj View Post
    No, you need a short length of 1 1/2" copper to go between the two pieces.
    Thank you HJ.

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