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Thread: Double kitchen sink w/disposer plumbing

  1. #1

    Default Double kitchen sink w/disposer plumbing

    During a kitchen remodel the plumbers installed our double sink with garbage disposal in the manner shown in the photo. Can you see that is potentially wrong with this? Yes, we get some reflux up the baffled T toward the drain basket. It does not ever get very far but still muck above the P- trap can lead to stink.

    How should I got about fixing this? Given the RO storage tank takes up a huge volume in the cabinet, as does the insinkerator (but I love that thing). Also, the vertical I have between disposal and the wall pipe does not allow too much forgiveness.

    Would a san-T between the disposal and P-trap work or should I cut the wall line back and/or 45 or 90 it toward the drain basket? I have about 6" coming out from the wall.

    Thanks.
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    Last edited by vinnithenose; 08-23-2009 at 01:47 PM.

  2. #2
    Plumber jimbo's Avatar
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    Can't tell from the pic......you say it is a baffle tee that the disposer elbow drops into. Are you sure?

  3. #3
    Forum Admin, Expert Plumber Terry's Avatar
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    Your baffle tee should be on the horizontal.
    The one of the left that is plugged is the proper baffle too for the vertical position.

    Here is how these things normallly look.


  4. #4

    Default

    I am not positive but I believe it is a baffle tee where the disposer and the centers meet just above the p trap.

    Baffle has a diverter to keep the down water going down encourage the side water to go down?

    The one on the left with the plug isn't a plug but is drain from the RO.

    The horizontal does not get plugged, just gets a bit mucked. Because it is so vertically close to the p trap that splash back or fill up occurs before flow?


    Space is just so limited in here. Probably part of why plumber did it this less than awesome way.

    My options that I can see that make sense (in order of most laborious to least):
    To make flow look similar to Terry's post;

    1) Cut dry wall and move the drain line to the left a few inches so the trap is closer to the RO tank and perpendicular to the wall.
    2) Cut and angle (45 or 90) wall pipe as is so P trap is closer to RO tank. These will both require putting in at least one 45 (probably two) to jog the left drain around the tank. As it is the drain is already being pushed a bit by the tank.

    2b) Unless I can find a more narrow RO tank that still holds around 4 gallons. This has 11" diameter.

    3) Call the general contractor who did the construction and tell them the plumber did a half ass drain job and make him fix it.

    Thoughts?

  5. #5
    Moderator & Master Plumber hj's Avatar
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    Default drain

    The first thing to do is find a plumber who knows how to install a proper drain. That looks like one I threw away last week because the water kept coming up in the sink when the disposer was turned on. IF it is done properly there will be plenty of space for the storage tank, and everything will drain properly. After I repiped it and the sinks drained properly, the customer thought I was a genius.

  6. #6

    Default yeah, but

    The GC is responsible for quality work. At least in CA that's how it goes. Perhaps I should make him bring in another sub (plumber) from the one who did this. But I paid for this to be done, per plans and per code. Should I have to pay again? Should the inspector (who was a plumber by trade) have signed off on this.

    And again I ask. Is it a not good idea to put a 45 or two in the drain basket line in addition to some additional bends in the wall drain line. So far it all drains ok. (no lag, no back up).

  7. #7
    Moderator & Master Plumber hj's Avatar
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    Default drain

    He already HAS more bends in the line than he needs, so why would you want more of them?

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