I may break code

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by geniescience, Sep 7, 2007.

  1. Under a hand rinse sink (one DFU) I need to install a "close elbow" in order to hide the plumbing from view. The sink is on a slim counter and they don't want to see the pipes under the counter. The plan is to send the waste straight back to the wall, immediately after it drops through the counter.

    So there would be a tight turn, not a long sweep.

    Luckily, I have room in the cupboard before the wall, to put an air intake so the pipe can grab some air (or let some out) before the P trap. Like an air gap.

    This application is like the kits sold for wheelchair access. I notice that the big manufacturers all sell a close elbow kit, for $100, and just to get a single component of the kit costs $100 too!

    The little drawing might illustrate well what I am thinking.

    Since the sink has an overflow, and the waste line has an air intake, I am thinking that this whole setup will drain well. Is this the best compromise?

    What say you?

    David

    Attached Files:

    Last edited: Sep 7, 2007
  2. patrick88

    patrick88 Plumber

    Messages:
    836
    Location:
    Webster Ma.
    "Luckily, I have room in the cupboard before the wall, to put an air intake so the pipe can grab some air (or let some out) before the P trap. Like an air gap."

    I dont think you would need that. this seems to be a common theme with H/C sinks. Im sure it will be ok.
  3. frenchie

    frenchie Jack of all trades

    I'm thinking of the drain/overflow assembly on a tub - which has an even tighter elbow from the drain, if you think about it.

    I also think you'll be fine.

    Then again, I'm not a plumber.
  4. GrumpyPlumber

    GrumpyPlumber Licensed Grump

    Messages:
    1,404
    Location:
    Licensed Grump
    Dave, if that drain is on it's own, without tying into another horizontal drain, then you're fine.
    In My state it's ok to use a short sweep on single drains horizontally as long as it's not connecting to anything else at that 90.
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,515
    Location:
    Cave Creek, Arizona
    trap

    A chrome "bottle trap" would have very little exposure, it the waste outlet is high enough. Otherwise an offset handicap sink drain, with a 1 1/4" x 12" tailpiece tube threaded into the outlet and going through the wall would work, assuming you intend to install the trap behind the wall.
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