Adding utility sink to laundry room

Discussion in 'Illinois Plumbing Code Questions' started by brownmc, Jul 8, 2014.

  1. brownmc

    brownmc New Member

    Messages:
    3
    Hello, my name is Matt. First time caller... I have seen similar questions to mine posed but not exact. This is on a ranch home built in 2006 with open access to unfinished basement. I currently have top load washer, I am getting a stackable washer/ dryer. I would like to put a utility sink where the top load washer currently is. I was planning on adding a 2'' sanitary tee to the stand pipe (which is 2''), dumping the washer into the utility sink and taping off the existing water supply lines. The vent is somewhat visible in the 2nd picture, it is 1.5''. Is this legal? Is there a better way? My concern with the aforementioned is that it won't be very appealing to the eye having hoses running this way and that. Any information would be appreciated and if there's any pertinent info. I have omitted please let me know. I live in a small town about 70 miles west of Chicago. Thanks Matt

    Pic #1: view from laundry room
    Pic #2: view from behind my oven which shares the same wall as the laundry plumbing
    Pic #3: view from basement looking up: laundry water supply and sewer tie in

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    Last edited: Jul 8, 2014
  2. Terry

    Terry Administrator Staff Member

    Messages:
    14,891
    Location:
    Bothell, Washington
    Cutting a santee into the standpipe doesn't prevent what the vented santee is designed for. Siphonage.
    In new construction, it would look like this. Or at least both fixtures vented to prevent a trap from siphoning.

    [​IMG]

    Here both the washer standpipe and the laundry tray are vented. It only takes a few more fittings.
    Cutting out the drywall and putting it back is pretty simple.
  3. brownmc

    brownmc New Member

    Messages:
    3
    Thank you for your reply. Oddly enough that photo you shared is one I found doing a google image search. I can't wrap my head around how to make that work in my configuration. I've made a crude edit to these photos, hope it helps and doesn't insulate anyone's intelligence.

    Attached Files:

  4. brownmc

    brownmc New Member

    Messages:
    3
    I guess I can't picture how I would vent the existing stand pipe as there is very little room to work with
  5. Terry

    Terry Administrator Staff Member

    Messages:
    14,891
    Location:
    Bothell, Washington
    That's why I'm suggesting you remove some of the wall cover. It's easy enough to plumb for two fixtures if the wall is open. You just have to be open to the options you have.
    What you have now is a big restriction, the wall board.
    There are at least three ways to do that right. They do include tying into the vent higher up, and tying in lower down. You may need to move the washer trap up a bit, or you may wye in from the floor below.
  6. Terry

    Terry Administrator Staff Member

    Messages:
    14,891
    Location:
    Bothell, Washington
    [​IMG]

    This one had a double lav plumbed over the washer, but it could have been a single laundry tray too.
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,488
    Location:
    Cave Creek, Arizona
    You said you will dump the washer into the sink. THEREFORE, all you have to do is remove the washer "P" trap and tee then install a new tee at the proper height for the sink.
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Forum Title Date
Illinois Plumbing Code Questions Utility sink and washer - is Design Correct Oct 18, 2010

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