p-trap above drain pipe?

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by sharkie, Feb 19, 2014.

  1. sharkie

    sharkie New Member

    Messages:
    5
    Location:
    maryland
    During a remodel of a master bathroom a few years ago my plumber shook his head when he saw the vanity that I had picked out. It had a shelf that was about 1 inch below where the pipe went into the wall. He said it would give us problems, but he would do what he could. So he made a p-trap and put it a little higher than the pipe going into the wall. I do not notice odors, and the sink drains OK but it is maybe a bit more dirty than my other sinks. My husband thinks it isnt a problem, he is more concerned with the drain in our other bathroom sink that has a funny downpipe with ridges on it. I think it ended up that way because it was an Ikea sink and the pipe sizes were different than what we had installed for the other sink that was in there. Hopefully I have attached the pictures correctly so you can see what I am talking about. I want to cut the shelf and put in a proper p-trap. Am I crazy?

    Attached Files:

  2. jim mills

    jim mills New Member

    Messages:
    141
    Location:
    nebraska
    The first pic is classic. The p trap is on backwards, and those corrugated lines should be outlawed. Looks like the popup drain is a bit too close to the wall, which may require a 1/8 or 1/16 bend to accommodate the properly installed p trap. The second pic shows an s-trap. You don't want that. Either remove the shelf & extend the tailpiece, or cut a slot in the shelf to accommodate the trap.
  3. sharkie

    sharkie New Member

    Messages:
    5
    Location:
    maryland
    ok illegal - will do the fix, but what do I tell hubby who isnt too worried about legality? Are gases getting up in the drain?
  4. Reach4

    Reach4 Active Member

    Messages:
    2,235
    Location:
    IL
    Maybe something like this, but with a clearance hole in the shelf rather than this method which makes maintenance not feasible. [​IMG] Alternatively, somebody might have an idea using an AAV to avoid the S trap problem.
  5. jim mills

    jim mills New Member

    Messages:
    141
    Location:
    nebraska
    Maybe...maybe not. It's just that it violates today's code, and a knowledgeable plumber would not configure it like that. If you are smelling sewer gas in that sink, the s trap is likely the problem.
  6. mikeplummer

    mikeplummer Plumber

    Messages:
    190
    Location:
    Ontario, Canada
    your "plumber" shook his head at your vanity choice....any good plumber would shake their head at his "plumbing"
  7. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,006
    Location:
    New England
    An S-trap can work TOO well, and there's no water left in the trap, or at least not enough to make a good seal. The choices are: redo the piping in the wall to raise the trap arm, or lower the trap so that the trap arm can go horizontal (well, small slope) into the wall.
  8. Reach4

    Reach4 Active Member

    Messages:
    2,235
    Location:
    IL
    huge4.png
    Here is the general idea of using an AAV, which are allowed in some places.
Similar Threads: p-trap above
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & Bottle Trap or P-Trap Wednesday at 6:26 AM
Plumbing Forum, Professional & DIY Advice, Tips & I'm fed up trying to get my p-trap and riser plumb. Please help me before I spontaneously combust! Sep 2, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Kitchen P-trap leaking. What am I missing? Aug 5, 2014
Plumbing Forum, Professional & DIY Advice, Tips & p-trap position Jul 31, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Options for a high set P-trap Apr 17, 2014

Share This Page