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Thread: Adding Utility Sink - Drain and Vent Help Please!

  1. #1
    DIY Junior Member jshrop's Avatar
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    Default Adding Utility Sink - Drain and Vent Help Please!

    Hi Everyone, I have been searching for a while on doing this project, and today I finally started probing around in the wall to see what I have to work with. First off, I'm in California, if that helps with what codes to work to. I haven't seen any other examples quite like what I have (which is always the case right?) so the first image attached is what I have now. I'm sorry I don't have any pictures, I did all of my scouting with an inspection camera on a snake through a hole above and a hole below. The second image is what I was thinking of doing.

    I guess the first thing is, am I approaching this wrong? Can I add another Sanitee below the one that is there for the washer drain if I pull the vent around way above the other piping? If not, should it be a fixture tee? wye? what? Second, what kind of tee do I need for a vent? Is a regular tee to code for the vent?

    The original plumber installed the cleanout that is there now facing into the next bedroom, so I will be cutting this section out anyway to put a new cleanout which will face the laundry room, and actually have it come out the wall, because until today, I didn't even know it was there. If you have any other help, questions, or comments, I appreciate it!
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  2. #2
    Master Plumber-Gas Fitter shacko's Avatar
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    Looks o.k. to me.

  3. #3
    Moderator & Master Plumber hj's Avatar
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    I am not sure what you mean by a "normal tee", but a "straight vent tee" could be used, if you can find one. Otherwise a sanitary tee installed upside down is what we normally use.

  4. #4
    DIY Junior Member jshrop's Avatar
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    Thanks for your help guys. I'll probably do the sanitee upside down. It's going to be tight coming above everything else and staying underneath a framing cross member, so the vent for the new line will probably have to be 1 1/2 instead of 2, but other than that I think I'm good now. Thanks again!

  5. #5
    Master Plumber-Gas Fitter shacko's Avatar
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    You only need a 1-1/2 vent

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