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Thread: drains/vents help

  1. #1
    DIY Junior Member barneyfife's Avatar
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    Default drains/vents help

    Hi all,

    Attached is an edge on view of a room off my garage. There used to be a toilet and sink in there, but the previous owner removed them for whatever reason. Everything is still connected below floor level to a 3" waste drain, which ties into the main waste drain, then to the septic tank.

    He sawed off the 2" vent stack, and what I am assuming was a sink drain, flush with the floor, and just put some insulation in the holes. I would like to put the toilet and sink back in there.

    The toilet is easy, because the ring and everything is still there, so just a matter of buying and bolting down a new toilet

    I know that is where the vent stack was because there is still a hole directly above in the interior ceiling where it went out through the roof.

    I assume the last 2" hole was where a sink or washing machine drain was.

    I would like to put a utility sink and toilet back in, so what is the best way to hook up the sink. Tie it into the vent stack with a Tee, and cap off the old drain, or just run a new vent stack, and drain the sink through what looks like the old drain?

    Apologies if not explained very well, but hope picture helps. Anymore info needed please advise

    Thank you
    BarneyName:  drains.jpg
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    Last edited by barneyfife; 02-14-2014 at 03:20 PM.

  2. #2
    Test, Don't Guess! cacher_chick's Avatar
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    Default

    The sink needs to be plumbed with a p-trap draining into a sanitary tee, with the sink's vent going up and drain going down. The vent can turn horizontal to tie into the vent stack once it is at least 42" above the floor.

    If the piping is the way you portray it, the toilet will not be properly vented, but it will work.
    Last edited by cacher_chick; 02-14-2014 at 05:40 PM.

  3. #3
    DIY Junior Member barneyfife's Avatar
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    Default

    Thank you for your response. The piping is the way I portrayed it, going out to the septic on the left side of the drawing.

    Might I ask why the toilet is not properly vented?
    Should I just cap off the old drain, or use it for a clean out?

    Thank you
    Barney

  4. #4

    Default

    if you keep the 2" sink drain and it remains 2" till the point of connection of the sinks trap arm then you don't need the other vent between them, as the sink will be wet venting the toilet

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