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Thread: I may break code

  1. #1
    Homeowner geniescience's Avatar
    Join Date
    Nov 2005
    humid summers hot, humid winters cold

    Default I may break code

    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?

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    Last edited by geniescience; 09-07-2007 at 08:04 PM.

  2. #2
    Plumber patrick88's Avatar
    Join Date
    Sep 2007
    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.
    I'm just starting to work with an old friend of mine to bring solar electric and hot water systems, wind turbines, Flex Fuel Boilers, batteries, hydroponic gardening, books, pellet grills and more. Also the parts for DIY installation.

  3. #3
    Jack of all trades frenchie's Avatar
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    Dec 2006
    Brooklyn, NY and Fire Island, NY


    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.
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  4. #4
    Licensed Grump GrumpyPlumber's Avatar
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    Jun 2007
    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.
    "The biggest regrets we have in life are the chances we never took."

  5. #5
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona

    Default 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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