(206) 949-5683, Top Rated Plumber, Seattle
Page 1 of 2 12 LastLast
Results 1 to 15 of 16

Thread: How to plumb basement sink drain?

  1. #1

    Default How to plumb basement sink drain?

    I'm finishing a bathroom in my basement, roughed in by builder 6 years ago. Did I plumb for the sink correctly? Thanks!
    Attached Images Attached Images  

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,405

    Default

    Does the horizontal drain slope down to the vertical connection?
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3

    Default

    Yes. I sloped the pipe down to the vent. I was just concerned because I saw some pictures showing a loop configuration for a sink drain.

  4. #4
    Plumber/Gasfitter dubldare's Avatar
    Join Date
    Sep 2005
    Location
    MN/ND
    Posts
    286

    Default

    Not legal where I'm from- too many offsets in horizontal trap arm. Maximum allowed 90 between trap and vent.

  5. #5

    Default

    Quote Originally Posted by dubldare
    Not legal where I'm from- too many offsets in horizontal trap arm. Maximum allowed 90 between trap and vent.
    I'm sorry, I don't understand what you mean. I came straight off the vertical pipe and have a 90 at the end. What should I have done?

    Thanks.

  6. #6
    Plumber/Gasfitter dubldare's Avatar
    Join Date
    Sep 2005
    Location
    MN/ND
    Posts
    286

    Default

    It appears that between the vertical stack (where the tee is) and where the sink goes, you are offsetting 180 degrees (on the horizontal).

    The tee is where the vent for the sink is.

    If you would have drilled the studs and aimed the tee toward the 90 for the sink, you would be fine.
    Attached Images Attached Images  
    Last edited by dubldare; 01-23-2006 at 08:18 PM.

  7. #7

    Default

    Doh!
    Thanks. Now I understand.
    I did it that way because the wall was framed slightly out of square and I am ripping 2x4's to make that wall square. So, there isn't room to notch them. So, can I get by with this, or is there another way to do it?
    Thanks.

  8. #8

    Default

    One more try;
    Is there a way to plumb this with the pipes going behind the wall as I've done? What about a loop to the vent? Is that what I need?
    What would happen if I just left it the way it is? Would it still work ok?

    Thanks...

  9. #9
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Location
    Cave Creek, Arizona
    Posts
    25,653

    Default drain

    It will work, but it may be more difficult to snake it if the line becomes obstructed.

  10. #10

    Smile

    Thanks for your advice!

  11. #11
    Forum Admin, Expert Plumber Terry's Avatar
    Join Date
    Aug 2004
    Location
    Bothell, Washington
    Posts
    14,202
    Blog Entries
    1

    Default

    And an inspecter would likely turn you down with the extra bend in the pipe.

    No plumber would have done it that way.

  12. #12

    Default

    I'm open to suggestions..
    I can't go straight through the studs, because they will only be about 2 inches thick in that area.

  13. #13
    In the Trades Gary Swart's Avatar
    Join Date
    Sep 2004
    Location
    Yakima WA
    Posts
    7,246

    Default

    How about making the entire wall wider. You could sister on to the 2x4 studs with 2x6s or even 2x8s and that would give you the room you need. Walls that have drain pipes usually have 2x6 studs.

  14. #14

    Default

    Thanks for the suggestion!
    I hadn't thought of using 2x6's. Sounds like a good idea!
    Just to make sure I'm not screwing this all up, I have attached more photos to better represent my situation.
    In order to make the tub fit correctly, and keeping the room square, I figured that I would need to rip some 2x4's to just barely enclose the vent pipe.
    But, the toilet rough in will be 12 inches on center from the studs, so I have to get a 10" toilet, right?
    I also have a standard tub at the end of the bath. That rough in seems to be ok. As you can see, I have already dug it out and attached the drainpipe to make sure it fits. (I am really paranoid about screwing this up!)
    Attached Images Attached Images   

  15. #15
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    Location
    New England
    Posts
    21,405

    Default

    When you add the 1/2" drywall, the 11.5" you have left will still allow some 12" toilets to fit...so, all is not lost, you just have to be more selective. The selection of 10" rough-ins isn't as big.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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
  •