(206) 949-5683, Top Rated Plumber, Seattle
Results 1 to 10 of 10

Thread: Drain washing machine on first floor to laundry tub in basement?

  1. #1
    DIY Junior Member carlmm's Avatar
    Join Date
    Jul 2013
    Location
    Nebraska
    Posts
    3

    Default Drain washing machine on first floor to laundry tub in basement?

    Would this be feasible?

    There is a laundry tub/sink in the basement directly under the area where the washer and dryer will be placed on the first floor. Could I run a 2" drain line into the laundry tub? If so, would the drain from the washer to the laundry tub need the normal P trap and venting? (The laundry tub has a trap and is vented.)

    Apologies in advance if this has been discussed elsewhere. I looked and didn't see anything on point.

    Thanks!

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,395

    Default

    You have to be careful how you do this...the outlet of the WM must be within the specs, or it will just siphon itself dry during the fill. Generally, no, I don't think you'd get away with this. You may be able to tie it into the drain of the sink, IF it is large enough, but you'd also need to vent it properly. See what the pros have to say about this, as I'm not up on all of the codes, but the physics are clear...you'd need a standpipe for it so it didn't siphon.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3
    DIY scratch-pad engineer leejosepho's Avatar
    Join Date
    Nov 2006
    Location
    200 miles south of Little Rock
    Posts
    2,474

    Default

    Quote Originally Posted by carlmm View Post
    Would this be feasible?
    That depends upon what you might mean by "feasible" since it certainly would not pass an inspection. To do this properly, you need to run a drain line with trap down to a drain line of at least equal size, then run a vent on up to another vent line or out through the roof. But for a temporary drain while getting that done, a piece of 1-1/4" flex hose might do just fine as long as you fasten each end to something to keep it high enough for the washer and the other end inside the sink.
    "Great minds discuss ideas, average minds discuss events and small minds discuss people." --Eleanor Roosevelt

  4. #4
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,199
    Blog Entries
    1

    Default

    Drain washing machine on first floor to laundry tub in basement?

    No.

    804.1 All plumbing fixtures or other receptors

    receiving the discharge of indirect waste pipes shall be
    approved for the use proposed and shall be of such
    shape and capacity as to prevent splashing or flooding
    and shall be located where they are readily accessible
    for inspection and cleaning. No standpipe receptor for
    any clothes washer shall extend more than thirty (30)
    inches (762 mm), nor less than eighteen (18) inches
    (457 mm) above its trap. No trap for any clothes
    washer standpipe receptor shall be installed below the
    floor, but shall be roughed in not less than six (6)
    inches (152 mm) and not more than eighteen (18)
    inches (457 mm) above the floor.


    No trap for any clothes washer standpipe receptor shall be installed below the floor
    Below the floor would also include any floor below.

    Just install plumbing for the washer as per code and you will be fine.

  5. #5
    DIY Junior Member carlmm's Avatar
    Join Date
    Jul 2013
    Location
    Nebraska
    Posts
    3

    Default

    Thanks guys!

  6. #6
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,633

    Default

    However, it he just stuck a pipe through the floor into the laundry sink and hooked the washer drain over the top of it, all of the reasons for NOT having a long riser or trap under the floor would be invalid.
    Licensed residential and commercial plumber

  7. #7
    Consultant cwhyu2's Avatar
    Join Date
    Aug 2007
    Location
    Cincinnati OH
    Posts
    1,330

    Default

    Quote Originally Posted by hj View Post
    However, it he just stuck a pipe through the floor into the laundry sink and hooked the washer drain over the top of it, all of the reasons for NOT having a long riser or trap under the floor would be invalid.
    And that would be called an indirect waste.

  8. #8
    DIY Junior Member carlmm's Avatar
    Join Date
    Jul 2013
    Location
    Nebraska
    Posts
    3

    Default

    Quote Originally Posted by hj View Post
    However, it he just stuck a pipe through the floor into the laundry sink and hooked the washer drain over the top of it, all of the reasons for NOT having a long riser or trap under the floor would be invalid.
    That's sort of what I was thinking . . . but I want to comply with the local municipal code. I suppose that I'll err on the side of caution.

  9. #9
    DIY Member Joe Six Pack's Avatar
    Join Date
    Oct 2008
    Location
    Anchorage AK
    Posts
    31

    Default

    However, it he just stuck a pipe through the floor into the laundry sink
    Sort of like a rain gutter?
    Would taht work the for shower or tub to?
    How buout a kicthen sikn? can I rain gutter atht too?
    Joe Six Pack

  10. #10
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,633

    Default

    I once had a customer who wanted to connect his tub to a 3/4" pipe dropping into the basement. I told him if he did it, the tub would such anything within five feet of the tub down the drain, including his kids.
    Licensed residential and commercial plumber

Similar Threads

  1. floor drain/ washing machine hose in laundry room
    By nancy2012 in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 5
    Last Post: 05-09-2012, 02:59 PM
  2. Basement Plumbing for Washing machine, Floor Drain and sink
    By novicepiper in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 31
    Last Post: 03-14-2011, 07:27 PM
  3. Basement Laundry Tub & Washing Machine question
    By Ched in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 10
    Last Post: 01-27-2010, 12:51 PM
  4. drain in floor next to washing machine
    By kmob in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 2
    Last Post: 07-23-2009, 09:50 AM
  5. moving laundry machine - tie into floor drain
    By Andrew in forum Plumbing Forum, Professional & DIY Advice, Tips & Tricks
    Replies: 1
    Last Post: 02-19-2006, 11:04 PM

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
  •