DIY dishwasher install to double sink

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by renomama, Jul 10, 2010.

  1. renomama

    renomama New Member

    Messages:
    1
    Location:
    NY
    [​IMG][​IMG]
    My friend says this will work, is he right? I'm afraid I'm going to have backup. If it's not right what will work better?

    Thank you :)
    Last edited: Jul 10, 2010
  2. Terry

    Terry Administrator Staff Member

    Messages:
    14,794
    Location:
    Bothell, Washington
    That is wrong, wrong, wrong.
    Cut the tailpiece on the left and have the p-trap grade downhill to the sink drain.

    The first ruile of plumbing, is that water needs to go downhill.

    [​IMG]
    Last edited: Jul 10, 2010
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,820
    Location:
    New England
    Are those soap bubbles on the rubber connector, too? It isn't sealed well. As plumbed, the drain line (trap arm) will fill up with food particles and crud, and block up. It has to flow downhill from the output of the trap.
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,285
    Location:
    Cave Creek, Arizona
    Actually, there is no good way to connect whichever side gets the dishwasher. I would use two "P" traps on that installation, but the "branch tee" is still going to make that one hard to connect properly.
  5. MACPLUMB 777

    MACPLUMB 777 TROJAN WORLDWIDE SALES RP

    Messages:
    679
    Location:
    Houston, Texas, United States


    basically you need to cut the wall open and lower the san tee in the wall ! !

    Drainage water " does " not run uphill you have to get that lower in the wall that is

    all there is to it !

    Once you do that the rest of the sink plumbing will come together the right way ! !
  6. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    There are three inviolable cardinal rules of plumbing.

    1st rule: things flow downhill. You have created worse than a deep trap, which is a problem in itself. You have a serious crud catcher.
Similar Threads: dishwasher install
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & How to install a dishwasher Jun 15, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Installed new dishwasher which is a bit smaller, now there's a gap Apr 30, 2014
Plumbing Forum, Professional & DIY Advice, Tips & drainpipe behind dishwasher blocking new install Feb 23, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Temporary dishwasher install during a remodel Jan 4, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Help Installing New Dishwasher Dec 28, 2013

Share This Page