venting a double vanity with windows above

Discussion in 'Remodel Forum & Blog' started by dkkll, Dec 18, 2008.

  1. dkkll

    dkkll New Member

    Messages:
    5
    Location:
    New York
    Hi all,
    I am building a new bathroom and have a question on the vanity
    It will be a double vanity. The problem is there is a window 8' wide on the back wall of the vanity.I will not be able to run a vent up to the roof
    I was thinking of using a loop system as opposed to a aav valve
    Can I put the loop in the wall as opposed to in the vanity? I saw a pciture of the rough in for a double vanity on this site/ it looked pretty straight foward
  2. Terry

    Terry Administrator Staff Member

    Messages:
    14,942
    Location:
    Bothell, Washington
    You could use an island vent if there is no other option.
    Instead of a santee for one lav, you would use a double fixture fitting.

    Attached Files:

  3. dkkll

    dkkll New Member

    Messages:
    5
    Location:
    New York
    thanks for the reply is it ok if I put the loop in the wall
    the bottom of the window is about 5 feet from the floor
    can I run a vent horizontally approx 5 feet to the end of the window and then up to the through the roof
    which way would you go with
    horizontal vent
    loop
    valve
    thanks

    dkkll
  4. Basement_Lurker

    Basement_Lurker One who lurks

    Messages:
    668
    Location:
    Victoria, BC
    A proper vent would be better than a loop vent. If you are able to run that vent horizontally until you can clear the window and then run the line up through the roof, then that would be the way to do it.

    A picture of your proposed route would be good.
  5. dkkll

    dkkll New Member

    Messages:
    5
    Location:
    New York
    thanks for the reply
    I measured the window and the bottom of the window is 45 inches up from the subfloor
    the total width is approx 8 feet with vanity centered under window. i would be traveling approx 4 1/2 feet to right of the window and then up
    if i go horizontally from the center of the window. am i usuing 90 degree elbows to the end of the window or 45's and then the pipe would be pitched verticaly towards the end of the window and then up
    I am not sure if i have enough room to go with 45's
    also at what height should th waist and water supplys be
    thanks for the help
  6. you have enough height to do a standard vent. The window is high enough. Since you have the room to route a vent 6" or 7" above the flood rim of the bathroom sink. Just route the vent horizontally (with a minor slope to the drain) over to where you Can go vertically.

    -david
  7. dkkll

    dkkll New Member

    Messages:
    5
    Location:
    New York
    thanks for the info
    am i assuming correctly that i would use a 1 1/2 pvc for the vent ubove the 4way tee?

    i am mounting a toilet to the right of the vanity
    Does a toilet need a vent and if so can I tap into the 1 1/2 vent line or does it need a larger vent size of 1 1/2
    thanks
    again
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