(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 15 of 15

Thread: Drain question: new utility sink + washing machine drain

  1. #1
    DIY Junior Member brownetowne's Avatar
    Join Date
    Jun 2011
    Location
    madison, WI
    Posts
    4

    Default Drain question: new utility sink + washing machine drain

    I am replacing a utility sink in my basement near the washer / dryer. The old setup had the washer drain line empty into the utility sink basin. As part of the project, I would like to plumb the washer drain directly into the plumbing. Two questions:

    1. *What's my best drain option for both the utility sink and the washer?

    2. *Something I liked about draining into the sink was the additional lint catch wire mesh sock that I could dispose of 2-3 times per year. If I plumb into the line, is there something that would allow an interchangeable lint filter?

    The existing setup is fairly simple *a single trap that drains into a main stack. I'd upload the photo, but I seem to be having problems with that feature of this forum...

  2. #2
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    Location
    San Diego
    Posts
    9,001

    Default

    The sink may be connected to a 1" drain line. This is not adequate for a washing machine directly draining, and is not up to most codes

  3. #3
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Location
    Land of Cheese
    Posts
    3,134

    Default

    There challenges are that the washer will require a 2" drain and the traps from the washer and sink must be vented through the roof.

    Assuming you will need to run a new drain line into the building sewer, you will need to get a plumbing permit from the city and have the work inspected by the local plumbing inspector when it is ready.

    You can post a photo it's easiest to have it hosted on another web site and use their url.

  4. #4
    DIY Junior Member brownetowne's Avatar
    Join Date
    Jun 2011
    Location
    madison, WI
    Posts
    4

    Default

    Name:  browntowne1.jpg
Views: 11531
Size:  30.9 KB

    Plumbing in basement
    Last edited by Terry; 06-27-2011 at 09:44 PM.

  5. #5
    DIY Junior Member brownetowne's Avatar
    Join Date
    Jun 2011
    Location
    madison, WI
    Posts
    4

    Default

    thanks all for the replies.

    this is the current setup.

    I know I need to install new valves for the utility, but I have no idea where to start on the washer drain —*can it just be an addition to the sink drain after the trap?

    thanks!

  6. #6
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,191
    Blog Entries
    1

    Default

    It would look something like this


  7. #7
    Test, Don't Guess! cacher_chick's Avatar
    Join Date
    Jan 2008
    Location
    Land of Cheese
    Posts
    3,134

    Default

    Terry's is a perfect example of how it can be done.

    Luckily, it appears that you have an existing vent.

    You must have a separate sanitary tee in the drain stack for each of the 2 fixtures, with the sink tee directly above the laundry tee.
    The sink and the laundry standpipe must each have their own individual trap.

  8. #8
    Expert Plumber plumber2011's Avatar
    Join Date
    Jun 2011
    Location
    Boston, Massachusetts
    Posts
    70

    Default

    Brownetowne,

    Is there a kitchen sink above this? If so, check and see if the kitchen sink drains into the pipe going to the sink drain in the basement. If so, let us know as that will change our recommendations a bit, OK?

    Back to you...

  9. #9
    DIY Junior Member brownetowne's Avatar
    Join Date
    Jun 2011
    Location
    madison, WI
    Posts
    4

    Default

    Thanks for the recommendations, all.

    I made some headway last night after realizing I should re-route the water lines to one side of the basement window. Not ready to post and show quite yet, because that phase of the project isn't done yet.

    More to come tonight though.

    I'll post a picture with my idea of what needs to go where.

    Thanks!

  10. #10
    Expert Plumber plumber2011's Avatar
    Join Date
    Jun 2011
    Location
    Boston, Massachusetts
    Posts
    70

    Default

    Hi Brownetowne...

    You didn't answer my question about your kitchen drain? Please let us know if the kitchen sink from above drains into the cast iron drain pipe serving the basement sink, OK?

    Back to you...

  11. #11
    DIY Junior Member Multibeast's Avatar
    Join Date
    Jul 2012
    Location
    Madison, WI
    Posts
    1

    Default

    Can someone explain if there is any specific height to where the washer drain vent connects to the main vertical vent in this photo (near all the blue outlet boxes)? I am building a half-wall laundry area and would like to keep the wall as low as possible, hence hiding the connection in the wall. Thanks

  12. #12
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,374

    Default

    By code, if I'm understanding your question, the re-vent must be 42" or 6" above the flood plane, whichever is higher. The flood plane would be the top of the stand pipe, since if there was a clog below, it could rise to the top of that. Also note, that once a vent, always a vent, or once a drain, always a drain. IOW, you can't vent into a drain unless you re-vent it properly.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  13. #13
    DIY Junior Member outdoorguy25's Avatar
    Join Date
    Aug 2012
    Location
    Lakeville, WI
    Posts
    1

    Default Washer Wall box

    Quote Originally Posted by Terry View Post
    It would look something like this

    I know this is a somewhat of an older topic, but is there a code requirement for how far up the wall box has to be? I've got a window at 40.5 and I was hoping to attach the wall box under the window.

  14. #14
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,374

    Default

    There is a code requirement on the min/max length of the standpipe (the vertical above the trap). Then, you have the depth of the trap, which is really your limiting factor (well, you have to have enough room to install the sanitary T on the drain line, too). I don't remember the exact numbers (and it may change based on which set of codes you use where you live).
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  15. #15
    DIY Member christoff's Avatar
    Join Date
    Dec 2007
    Location
    Toronto Canada
    Posts
    49

    Default

    ive installed this setup, and the wife doesn't like the way it looks so, she would like it all hidden behind the washer. my question is how low can i put the box and standpipe so the operation is still correct? it's about 43 inches up now.i would like it at about 30 inches or so. thanks

Similar Threads

  1. Utility sink and washing machine
    By n2learning in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 11
    Last Post: 03-29-2010, 03:01 PM
  2. Washing machine and utility sink tie in question
    By dannyd38 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 8
    Last Post: 02-12-2010, 12:32 PM
  3. Washing Machine Drain Question
    By strobelw in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 4
    Last Post: 12-27-2009, 04:34 PM
  4. Washing machine drain question
    By mlb@hvwisp.net in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 12
    Last Post: 11-16-2009, 05:07 PM
  5. Washing Machine Drain Question
    By Smunderdog in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 10-24-2009, 11:51 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
  •