New Disposer with Double Sink Plumbing

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by SaShepherd, Jun 18, 2014.

  1. SaShepherd

    SaShepherd New Member

    Messages:
    6
    Location:
    British Columbia
    I am looking for the best way to plumb a double sink with new disposer install and dishwasher. The dishwasher is located on the right side of the double sinks and, ideally, I'd like to put the garbage disposer under the left bowl. Currently I have a horizontal waste pipe coming from the right bowl intersecting a vertical waste pipe under the left bowl down to a P trap. The waste line exits the wall directly below the left bowl. Is there any way to put the disposer under the left bowl ( I'd really prefer to do this so I don't have to rearrange all the garbage cans etc. under the sink) or do I need to put it under the right bowl and run a horizontal waste line across to the left side and then down through the P trap?

    Thanks for any help in advance!
  2. Terry

    Terry Administrator Staff Member

    Messages:
    15,125
    Location:
    Bothell, Washington
    As long as you can cut and use fittings to move the waste to the right side, you should be fine.
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,831
    Location:
    Cave Creek, Arizona
    IT depends on how the piping is arranged. WE could probably do it, but we have no idea if you have the experience or ability to do so.
  4. SaShepherd

    SaShepherd New Member

    Messages:
    6
    Location:
    British Columbia
    That's the question. I am quite capable when it comes to work like this, but I just don't know what is the best way for the piping to be arranged if I put the disposer under the left bowl? Here is how it currently looks:

    photo(4).jpg


    Would putting the vertical waste line under the right bowl with a T horizontal waste line across to the garbage disposer, a P trap below the T and then run a horizontal pipe across from the trap to the wall waste outlet connecting with a 45 be a solution? Seems like a lot of room under the sink would be taken up by plumbing with this solution though.
    Last edited: Jun 18, 2014
  5. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,831
    Location:
    Cave Creek, Arizona
    YOu would have to put a 45, 60, or 90 at the wall to direct the drain to a trap located under the right hand sink.
  6. SaShepherd

    SaShepherd New Member

    Messages:
    6
    Location:
    British Columbia
    So I could even use a 90 to direct the drain from the wall across to the trap located under the right sink and this would keep the waste line tight to the wall so as not to waste too much space.
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