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Thread: Canadian dishwasher install...with a twist ;o)

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    DIY Junior Member bitsdoo's Avatar
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    Default Canadian dishwasher install...with a twist ;o)

    Alright, here goes. First things first I did a search and could not find my situation so I'm starting a new thread. Doing a kitchen reno and in that replaced the dishwasher (herein DW). To make things more accessible incase there is trouble down the road I want to change the plumbing. The old DW plumbing was typical, drain going to the sink plumbing and tied in with a DW tee. DW supply also came off the sink plumbing.

    Wher the DW will sit is directly above my furnace room, and the point of entry of all water and the main drain/stack. I want to plumb the supply from the basement (no problem here) and tie the DW drain in to the basement as well. I've included a diagram (which is attached) of what I want to do. I think I've included all pertinant info, if you need anything else just let me know. The house is a 4 level sidesplit, with the kitchen being directly above the lowest/basment floor. Obviously there is more plumbing but it is irrelevant (IMHO).

    Please provide feedback on this install, am I up to code? Do we see any issues with the plumbing and if so what do I need to change.The new plumbing is circled.

    Thanks in advance for all your help.

    bitsdoo.Attachment 11252Name:  DW Layout.jpg
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    Last edited by bitsdoo; 08-20-2010 at 07:03 AM.

  2. #2
    In the Trades Jerome2877's Avatar
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    Is that a trap after where the DW ties into the sink drain? You cannot install a trap in this way and if there is a trap for the kitchen sink you will siphon it when the dishwasher drains. Why are you doing this? The way it was is the standard and best way IMO to hook up a DW.

  3. #3
    Journeyman & Gas Fitter Doherty Plumbing's Avatar
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    Quote Originally Posted by bitsdoo View Post
    Alright, here goes. First things first I did a search and could not find my situation so I'm starting a new thread. Doing a kitchen reno and in that replaced the dishwasher (herein DW). To make things more accessible incase there is trouble down the road I want to change the plumbing. The old DW plumbing was typical, drain going to the sink plumbing and tied in with a DW tee. DW supply also came off the sink plumbing.

    Wher the DW will sit is directly above my furnace room, and the point of entry of all water and the main drain/stack. I want to plumb the supply from the basement (no problem here) and tie the DW drain in to the basement as well. I've included a diagram (which is attached) of what I want to do. I think I've included all pertinant info, if you need anything else just let me know. The house is a 4 level sidesplit, with the kitchen being directly above the lowest/basment floor. Obviously there is more plumbing but it is irrelevant (IMHO).

    Please provide feedback on this install, am I up to code? Do we see any issues with the plumbing and if so what do I need to change.The new plumbing is circled.

    Thanks in advance for all your help.

    bitsdoo.
    Well the fixture outlet coming off the kitchen sink is VERY GOOFY but not against code. However the running trap you have drawn in there is against code.

  4. #4
    DIY Junior Member bitsdoo's Avatar
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    Thanks for the replies gentlemen.

    First things first, drawing is revised to show vent and second trap, my fault for not takiing a better look. The picture now shows exactly what I have on the kitchen sink take off.

    Alright the only new install is the part circled in red (i.e. the DW install), everything else is existng and is what I walked into. I want to install the DW like this so that I can access the plumbing if I have to for a leak or issue. You see, on the new cabinetry that I'm installing will be a marble tile countertop. Once this counter top goes on it doesn't come off without breaking it. I want all plumbing to be easily accessible and the best way for me to do that is to have it all in the furnace room which is directly below the DW and the kitchen. I could run the DW drain to the kitchen sink if I need to, I'll just run it under the floor and then back up. Why is the trap aganst code? What do I need to do to make it within code?

    Thanks in advance for all your help.

    Jay.
    Last edited by bitsdoo; 08-20-2010 at 07:04 AM.

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    In the Trades Jerome2877's Avatar
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    So you won't be able to remove the DW without breaking the counter? Not the best plan but your call. Now that you have shown a vent it won't siphon the sink trap but you still have a running trap in that line. You would need to install a trap then Y it into the line.

  6. #6
    DIY Junior Member bitsdoo's Avatar
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    Thanks for the reply. I can remove the DW without breaking the counter, I won't be able to get to the plumbing\drain (which runs along the bottom and back of the cabinets hidden.

    Should I take out the running trap? I don't see a use for it if there is a trap on both the sink and the DW. Any rules/code I need to follow?

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    Forum Admin, Expert Plumber Terry's Avatar
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    Probably any thing goes in Canada.

    Here is how I would do it South of the border in the US.


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