Adding sink with new vanity

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Ryan98270, Feb 18, 2020.

  1. Ryan98270

    Ryan98270 New Member

    Joined:
    Feb 18, 2020
    Location:
    Seattle
    Hello
    Ive studied the related threads on this topic and I'm either too novice to understand how to apply the solutions provided, or my setup is different. I chased a leak in my bathroom which led to me remove flooring, vanity, drywall, etc. Now I want to replace it with 2 sinks and need a little advice.. My local plumbing store said I can add the sink to the existing drain by splicing into it directly below the existing sink line. Does that sound right? Cut below the tee, add another in, run it 3 feet over then shorten the existing sink line (to move it to the left about 18 inches)

    Id also like to add a stop directly after the right sink, accessible inside the vanity, to stop flow to the standalone tub at the end of this run. What parts do I need to accomplish that? Im converting this all to pex by the way.

    Any advice is greatly appreciated! I apologize for creating another thread on this issue that other people may not have needed to. Im just not able to apply the previous solutions to mine...

    All 1.5" ABS

    Ryan
    Marysville, WA 20200215_065053.jpg
    IMG_20200219_112404.jpg
    20200210_132815.jpg
     
    Last edited: Feb 19, 2020
  2. Ryan98270

    Ryan98270 New Member

    Joined:
    Feb 18, 2020
    Location:
    Seattle
    I see these 2 diagrams for 1 1/2", how can I apply this with my current setup? The 2nd picture would work but both sinks will be to the right of the drain/vent IMG_20200220_001549.jpg
     
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  4. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    Here is another way:

    Yellow vent connects 42 inches or more above the floor with upside down santee or vent tee. That is the opposite of how I drew it. Sorry. 1.5 inch OK. Vent connects to white drain line with combo or wye+45.
    img_4.jpg
     
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  5. Ryan98270

    Ryan98270 New Member

    Joined:
    Feb 18, 2020
    Location:
    Seattle
    Thank you!
    Without the added piping you drew I may end up with venting or code problems right? I feel more comfortable with your solution and is likely exactly what im going to do. I assume the vent pipe needs no slope and the upside down santee is for future snaking..
     
  6. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    The horizontal should slope but in reality it would not be critical. The upside down santee will probably get you that slope.

    Snaking may have been the reason for that. I thought it might assist getting the air going the right direction.
     
  7. Ryan98270

    Ryan98270 New Member

    Joined:
    Feb 18, 2020
    Location:
    Seattle
    20200309_155753.jpg

    Here is what I went with... Sinks are 44 inches apart so it's a little funky.. Rough ins are at 21" to the center of the pipe opening... Is that ok? Also the lowest drain fitting I used is a combo is that a problem? I also put too much slope on that horizontal line, 1.5" over 18" run... Will these issues cause me problems? No inspection but I want a solid functioning setup..
    Thx!
     
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