DWV Advice Please...Bathroom + Laundry Room

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by rughead92, Jun 11, 2011.

  1. rughead92

    rughead92 New Member

    Messages:
    3
    Location:
    new jersey
    I am putting in a half bath room in part of my old laundry room. There is a laundry sink and washing machine drain stack existing now. The sink drain is attached to a vertical 1 1/2 inch vent up through the roof. The laundry drain stack is tied into that vent/drain.

    I need to move the laundry drain over 90 degrees to the new wall I framed and add a toilet drain. The horizontal drain lines in the basement in this area are 2 inch - so I know I need to change them out to 3 inch.

    I would appreciate any advice on setting up the drains and vents the best way. Thanks!

    house 010b.jpg house 011b.jpg house 006b.JPG house 009a.jpg house 007b.JPG
  2. SacCity

    SacCity In the Trades

    Messages:
    189
    Location:
    Sacramento, CA
    Only hard part I see is how are you going to get a new vent for the toilet up the wall.
    The existing vent for the lav is 1-1/2 inch and you need at least 2 inch vent.
  3. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    Is that a toilet flange on the floor? Was that existing? Maybe it is already tied in//
  4. rughead92

    rughead92 New Member

    Messages:
    3
    Location:
    new jersey
    I just cut the hole for the toilet flange...haven't tied it into the drians yet.

    And I thought I was ok with the 1 1/2 vent because the DWV in the basement is only 3 inch.

    Thanks.
  5. cwhyu2

    cwhyu2 Consultant

    Messages:
    1,331
    Location:
    Cincinnati OH
    Vent can be 1/2 the size of pipe you are venting.3" pipe 1 1/2" vent.If you want to go larger vent that is ok.
  6. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,068
    Location:
    Maine
    Under IPC and UPC toilets can be vented with 1 1/2 and the distance from closet to vent is unlimited
  7. rughead92

    rughead92 New Member

    Messages:
    3
    Location:
    new jersey
    Can you advise on the laundry drain. Can I am extend the laundry drain around the 90 degree turn (new wall) and leave it attached to the existing drain stack. Its less than 5 feet away from the vent. Will the the 90 degree turn soon after the trap will cause a problem? Would I have to tie in a new vent after the 90 degree turn (extending up 4 feet, then horizontal over to the existing stack?)

    Thanks!
  8. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,068
    Location:
    Maine
    The 90 should be fine. Be sure you are within vent to trap distance though.
  9. plumber2011

    plumber2011 Expert Plumber

    Messages:
    70
    Location:
    Boston, Massachusetts
    Hi Rughead,

    That 90 is fine as long as it is a LONG SWEEP 90, but tell us, is wet venting allowed in your area? How are you planning to run the piping for this new toilet...what vents the toilet here and how are you connecting everything? I don't think any code will allow a washing machine to wet vent a toilet, so you probably can't use the 2" (reduces to 1.5") feeding the sink/washing machine as a toilet wet vent, OK? Answer my questions...see what we all think here.

    You'll need a 3" cleanout on the new 3" drain at the change of direction where you connect into the existing 3" drain line and another 3" cleanout at the end of the run near the toilet, too, OK?

    Back to you...
  10. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,270
    Location:
    Cave Creek, Arizona
    By the time you finish the job, EVERYTHING you have now will probably be removed and revised. UPC REQUIRES a 2" vent for a toilet. we would have to be there, and it would cost you, to "set up the drains and vents properly". Installing them "properly" is our job and what we get paid to do.
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