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Thread: Circuit venting question

  1. #1
    DIY Junior Member jayare's Avatar
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    Apr 2013
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    Alberta, Canada
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    Default Circuit venting question

    Hey guys, long time lurker, first post. Sorry for the terrible drawing, but im just wondering if this bathroom group is properly circuit vented, it one water closet, a tub, a shower and two lavs. The dotted lines are the vents. Any corrections are appreciated. Im in Alberta btw.
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  2. #2
    Plumber Sean Beck's Avatar
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    Would probably be easier to wet vent everything upstream of the toilet, providing you have room for a 3" pipe. Run 3" upstream of the toilet, all the way to the double tee wye of the 2 basins. A 3" wet vent serving a toilet can take up to 8FU (fixture units). Bathtub (1.5) + shower (1.5) + 2 basins (1 each) = 5FU

  3. #3
    DIY Junior Member frodo's Avatar
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    Mississippi
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    run a 4" trunk line, up to the 4x3 y with 3" stubbed up in the wall between the sinks. with a 3" vent
    and bring a 3" stack vent up in the toilet wall to serve the trunk line revent the 3" sink vent back into the 3" vent stack

    disregard the 2" on the sink vent....supposed to be a 3
    i am assumeing this is a commercial bathroom
    Last edited by frodo; 07-05-2013 at 02:35 PM. Reason: opps
    the tree of liberty must be refreshed from time to time with the blood of patriots and tyrants
    herzlichen gluckwunsch zum dd ich bin uberrascht wen nicht alies da findet

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