Can sink share water supply with toilet via (dual) stop valve?

Discussion in 'UPC Plumbing Code Questions' started by muilebon, May 12, 2020.

  1. muilebon

    muilebon New Member

    Joined:
    Nov 6, 2018
    Location:
    Maryland
    Hello!
    I hope everyone is have a nice day!
    I am re-piping copper with PEX.
    My sink and toilet are right next to one another.
    Instead of "tee-ing" the cold water pipe for the toilet behind the wall
    I thought it could be more efficient to use a dual stop valve and split at the sink.
    Is this allowed by code?
    I am in Maryland.

    Thank you!
     
  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    It should not matter, but I don't really like dual stops. If you're doing that make sure you can isolate when one is off. I don't like shutting everything down just for one fixture.

    How long will your toilet supply have to be?
     
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  4. muilebon

    muilebon New Member

    Joined:
    Nov 6, 2018
    Location:
    Maryland
    Thank you, Terry!
    My toilet supply will be no more than 2 ft.
     
  5. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
    It will work fine, might look a little sloppy, You could put a tee where it comes out wall and use 2 stops. I dont think its legal for one stop but thats been an argument with dual stop for kitchen sink and dishwasher hot. Which I always put 2 stops.
     
  6. Reach4

    Reach4 Well-Known Member

    Joined:
    Sep 25, 2013
    Location:
    IL
    I had presumed that a valve similar to this was contemplated.

    [​IMG]

    I now think that the proposal is that a flex connector come through a hole, on the right side of the vanity cabinet, to the dual shut-off valve.

    [​IMG]
     
    Last edited by a moderator: Feb 25, 2021
  7. Jeff H Young

    Jeff H Young In the Trades

    Joined:
    Feb 27, 2020
    Location:
    92346
    that's better with 2 shut offs I had thought single valve. I actually had pictured the toilet on the left side with a long flex ha ha . Either way it works not a sanitary issue . Cosmetic if on the right side its not too wild .
    If it was a new build or you had walls all open Inspector likely give you a hard time but a repipe probably no problem especially with separate shut off
     
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