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Thread: Double sink rough in. . .

  1. #1
    DIY Junior Member TL's Avatar
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    Default Double sink rough in. . .

    Hello.

    Does anyone see any drain or venting issues with this rough in for a double sink? (All 1.5 inch pvc). The vertical vent tees into the shower vent in the attic and exits through the existing roof vent. I will be putting a 2x3 wall there, btw. Thanks!

    Tom
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  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    You should have a 2x1.5x1.5x1.5 fixture cross there, not a 1.5" sancross.

    Snaking that will be hard. They tend to skip over into the other arm.

    The two 90 els above the cross should have been at 42", or if not that, at least two 45's which is considered a vertical installation.
    When I have 1.5 coming from below, I do something like this.



    When I have 1-1/2" pipe, I do something like this.



    And this if I have 2" on the lower side.
    Last edited by Terry; 05-11-2013 at 02:39 PM.

  3. #3
    DIY Junior Member TL's Avatar
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    Ahhhh. . .thanks, Terry. That makes sense, but I have one problem . . .

    If I were to run it as you have pictured, I have a problem at the ceiling. As you can see from the attached pic, the vertical pipe "to the drain" lands on the plate above. To the left of the plate in the ceiling joists is a 2x8 on a flat, so I'd rather not drill through that. Above the small nail to the right in the pic is electrical wiring. So, I have to enter the attic through that hole you see there. Is is acceptable to come off with a 45 wye to get there? Please see my crude edit to your pic! Thanks again and I eagerly await your reply.

    TomName:  MasterBath 042copy.jpg
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    Last edited by TL; 05-11-2013 at 02:35 PM.

  4. #4
    Moderator & Master Plumber hj's Avatar
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    There are probably DOZENS of ways the two lines can be connected together. Terry's version is not "chiseled in stone".
    Licensed residential and commercial plumber

  5. #5
    DIY Junior Member TL's Avatar
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    Hi HJ.

    I'm open to suggestions! I want to get this thing done!

    Tom

  6. #6
    DIY Junior Member TL's Avatar
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    This should do the trick, no?
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    Consultant cwhyu2's Avatar
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    Yes, that will do the trick.

  8. #8
    Moderator & Master Plumber hj's Avatar
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    Overkill, but it will work.
    Licensed residential and commercial plumber

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    DIY Junior Member TL's Avatar
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    Well it only took 15 minutes, so it was easy enough. Thanks, all, for the replies! Much appreciated.

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    Forum Admin, Expert Plumber Terry's Avatar
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    That looks pretty dope!
    An expression that my son Jamie uses.

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    DIY Junior Member darren_t_johnson's Avatar
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    hj, why do you say its overkill? Because both vents run all the way to the ceiling instead of 42" (or 6" above the fixtures)? I'm probably mixing multiple plumbing standards...

    I'm just curious to hear other peoples opinions.

  12. #12
    Illinois Licensed Plumber SewerRatz's Avatar
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    I would of added a clean out above each tee.

  13. #13
    DIY Junior Member TL's Avatar
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    Thanks, Terry.

    Off to the next question. . .

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    Consultant cwhyu2's Avatar
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    Quote Originally Posted by SewerRatz View Post
    I would of added a clean out above each tee.
    And accsess how?

  15. #15
    DIY Junior Member TL's Avatar
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    Quote Originally Posted by cwhyu2 View Post
    And accsess how?
    That would be my question also.

    And I'm guessing overkill in the sense that I could save 2 feet or so of pipe by tying in that left drain vent connection at 42" or so instead of at the top. I could still do that as they are just dry fitted at this point.

    Tom
    Last edited by TL; 05-12-2013 at 06:30 PM.

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