Toilet & Sink rough-in

Discussion in 'Canadian Plumbing Code Questions' started by sardines, May 4, 2019.

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Toilet and Sink rough in layout 1 or 2?

  1. Layout 1

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  2. Layout 2

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  1. sardines

    sardines New Member

    Joined:
    May 4, 2019
    Location:
    Toronto, ON
    Hi
    I'm roughing in a bathroom and I'm looking for advice on how to tie a toilet and sink to an existing sewer line. I am doing this project with permits and would prefer passing inspection on the first visit.

    I came up with two options for wet venting the toilet with the sink. Do both options work?

    The kitchen sink is upstream and there are no other fixtures downstream after the bathroom.

    Thanks in advance
     

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  2. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    The toilet gets vented before entering the main line by the lav with PVC piping that is 2" all the way including the vent above the lav.
    You don't mix PVC and ABS pipe. Rather than put all of those fittings on the drain side of the lav, I would up first from the toilet arm, install a santee with a trap arm for the lav. That way the lav drains over toward that santee and down. A lot less snaking down the line.
     
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  4. sardines

    sardines New Member

    Joined:
    May 4, 2019
    Location:
    Toronto, ON
    Thanks Terry! Your recommendation for the lav drain is certainly more efficient.

    Good catch on the vent. The existing vent is 1 1/2" so I'll change it to a 3" toilet drain. I'll pick up a 4x4x3 wye for the toilet arm and 3x3x2 wye for the lav drain.

    Side note, I am allowed to mix pvc and abs here in Ontario, Canada with the appropriate transition cement.
     

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