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Thread: DWV for new basement bath and laundry

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  1. #1
    DIY Junior Member Theory's Avatar
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    Default DWV for new basement bath and laundry

    Hi Guys,

    I just moved into our first house last week and we are re-doing the basement and adding a half bath. I've attached a sketch showing the old and the new.

    Due to the laundry/bath config there will be a long run around a wall to the main drain,~15'-20'. I was hoping if I used the right fittings and venting setup this would work: 2" drain shared by the laundry stand pipe and the lav sink.

    Do you see any major concerns?

    I appreciate the help. I've been trying to wrap my head around venting/draining for the last week trying to figure out the setup. It was very hard to find a spot to accomodate the dryer vent, and plumbing venting which is why I'm not left with many options.

    Here is a nice link to Bert Polk's plumbing tips
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    Last edited by Terry; 12-15-2011 at 08:41 AM.

  2. #2
    DIY Senior Member Hammerlane's Avatar
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    Are you eliminating the laundry sink? I do not see it in the new diagram

  3. #3
    DIY Junior Member Theory's Avatar
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    That's correct. Eliminating the sink with the 1.5" drain, installing a 2" stand pipe for stackable laundry.

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    DIY Senior Member Hammerlane's Avatar
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    In the new drawing, is that a washing machine standpipe you have to the right of the sink on the first floor..
    Last edited by Hammerlane; 12-09-2011 at 11:15 AM.

  5. #5
    DIY Junior Member Theory's Avatar
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    That's correct. I was hoping if I used the appropriate fittings and vents I could use a 2" standpipe drain tied in with the lav sink. If this is a problem I will plumb a 2" drain all the way to the 3" stack for the washer and a 1.5" drain for the lav sink...

  6. #6
    DIY Senior Member Hammerlane's Avatar
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    There was a thread similar to yours a few weeks ago where someone wanted to drain both sink and washer standpipe on same branch drain. The washer flowing past the sink drain is NOT the ideal configuration. I saved the persons finished configuration where he remedied and tied the standpipe and sink into the stack at different heights.
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  7. #7
    DIY Junior Member lane234's Avatar
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    clicked Bert... he's from Oregon.... printed the22 pages... over kill in some ways... good to have it all in one place, thanks for the link

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