(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 5 of 5

Thread: Remodel drain question

  1. #1
    DIY Junior Member donohoo33's Avatar
    Join Date
    Feb 2012
    Location
    Portland, OR
    Posts
    2

    Default Remodel drain question

    We are doing a bathroom remodel and are removing an existing wall-mount toilet and replacing with a standard floor-mount toilet. Unfortunately, this creates a potential problem with the drain, since its now running in a different floor joist bay. There is a small stub wall next to the toilet separating it from an adjacent tub/shower. The tub/shower drain vent is located in this wall between the tub/toilet. The main drain line is on the other side of the tub:

    Toilet, wall with 2" vent, tub/shower, then main 3" drain line.

    The prior wall-mount toilet used to have it's own dedicated vent and connected separately downstream to the 3" drain.

    My question: Can I run the new 3" ABS drain towards the drain, pick up the 2" vent in the stub wall, then use this as a wet vent to pick up the tub/shower drain before draining into the main 3" drain? Based on the code I have read, it looks like you are allowed to use a wet vent for single bathroom groups, but the toilet is supposed to be downstream of any other fixtures, whereas in my case it would be upstream. Is this really a problem?

    Thanks

  2. #2
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Location
    Land of Cheese
    Posts
    3,151

    Default

    You will probably get more input if you post a drawing of the existing drainage plumbing along with a drawing of what you propose to do.

  3. #3
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,655

    Default

    Where the vent is located determines whether it will work or not, NOT whether the toilet is upstream or downstream.
    Licensed residential and commercial plumber

  4. #4
    DIY Junior Member donohoo33's Avatar
    Join Date
    Feb 2012
    Location
    Portland, OR
    Posts
    2

    Default Additional info

    Toilet flange is located about 18" to the left of the 2" vent. Tub/shower drain is about 12" to the right of the same vent - so the vent is in between the toilet and tub drain. Its about 4 feet from that point to the main 3" drain.

    I don't have the ability to upload a picture, but in order of connection:

    3" toilet flange, 3" long sweep 90, 18" 3" pipe, 3x3x2" sanitary tee for the 2" vent coming off the top, 12" of 3" ABS, 3x3x2" sanitary tee (2" tub drain coming into the top), then about 4' straight run to the main pre-existing drain.

    One other question would be - should I use a 45 wye instead of a sanitary tee for the tub drain connection to the 3"?

    Thanks

  5. #5
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,655

    Default

    quote; 3x3x2" sanitary tee (2" tub drain coming into the top),

    1. "Coming into the top" makes it an "S" trap which is ILLEGAL regardless of the fitting you use.
    2. You need a "Y" or combo for the vent connection.
    3. The tub has to connect to the vent riser pipe, NOT the main line.
    Last edited by hj; 02-29-2012 at 04:45 PM.
    Licensed residential and commercial plumber

Similar Threads

  1. Tub Surround Remodel Question/Concerns
    By wrea398 in forum Shower & bathtub Forum & Blog
    Replies: 0
    Last Post: 08-22-2010, 11:28 AM
  2. Bathroom remodel toilet question
    By FlynHokie in forum Toilet Forum discussions
    Replies: 2
    Last Post: 01-25-2009, 03:47 PM
  3. Shower remodel question
    By airplaneguy in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 8
    Last Post: 09-18-2007, 05:02 PM
  4. Basement Remodel Question
    By cardiaccath0 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 5
    Last Post: 08-21-2006, 04:42 AM
  5. Shower remodel question
    By jchance in forum Shower & bathtub Forum & Blog
    Replies: 10
    Last Post: 09-14-2005, 08:44 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •