toilet wet vent in Canada

Discussion in 'Canadian Plumbing Code Questions' started by christoff, Jun 24, 2010.

  1. christoff

    christoff New Member

    Messages:
    49
    Location:
    Toronto Canada
    i was wondering if you can run shower and tub drains to the 2" lav wet vent to the toilet?
    i don't know if the code is different in ontario. do the shower and tub have to have their own drain connection to the 3" toilet pipe.

    Attached Files:

  2. Basement_Lurker

    Basement_Lurker One who lurks

    Messages:
    668
    Location:
    Victoria, BC
    That is not a proper wet vent design.
  3. christoff

    christoff New Member

    Messages:
    49
    Location:
    Toronto Canada
    what would be the proper way?
  4. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,812
    Location:
    Cave Creek, Arizona
    The lav is a proper wet vent, but the tub and shower having "flat" vents are not proper.
  5. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    You could simply just wet vent all 3 fixtures downstream of the lav by making the lav drain 2" all the way up to the shower connection which would need to be a 3x2" wye so that downstream of the shower is a 3" wet vent.
  6. christoff

    christoff New Member

    Messages:
    49
    Location:
    Toronto Canada
    does this make the grade?

    Attached Files:

  7. nhmaster3015

    nhmaster3015 Master Plumber

    Messages:
    836
    Location:
    The granite state
    Nothing there will meet code. I wish I had the capability to draw it out for you but at this point I don't think you understand DWV well enough to be able to design the thing by yourself. Besides proper venting, proper slope, distance and use of fittings all comes into play not to mention how everything changes once the framing is in place. You need a professional to do this before it winds up costing you twice what it should.
  8. christoff

    christoff New Member

    Messages:
    49
    Location:
    Toronto Canada
    anyone else?
    btw 3 piece wet vent.
    Last edited: Jun 29, 2010
  9. nhmaster3015

    nhmaster3015 Master Plumber

    Messages:
    836
    Location:
    The granite state
    What is a 3 piece wet vent?
  10. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    Not true at all.


    [​IMG]

    The green circle is your a-typical wet vent of a bathroom group. There is nothing wrong there at all.

    The area circled in red is a concern because that appears to be a 1.5" flat dry vent. If it is you can't have a vent run flat like that until it is at an elevation of 6" above the flood level rim of the highest fixture it serves.

    The area circled in blue is a floor drain I am assuming. If it is this is also perfectly ok and hopefully it's a 3" floor drain so you can classify it as an emergency floor drain.
  11. christoff

    christoff New Member

    Messages:
    49
    Location:
    Toronto Canada
    the red area is a flat vent for about a foot and then straight up the wall to above the flood rim level, but i will use a t wye at 45 degrees and i think it will be acceptable am i correct mr. doherty
    and yes a 3" floor drain, and thanks for chiming in.
  12. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    As long as you come off the drain line with the vent at a nominally horizontal angle (or better you are ok). That is to say that you need to bring the vent off atleast at 45*.

    [​IMG]
    Last edited: Jun 29, 2010
  13. nhmaster3015

    nhmaster3015 Master Plumber

    Messages:
    836
    Location:
    The granite state
    No the red area is not to code because the lav dumps into the tub drain then into the toilet line. The wet vent can not come off a branch of the main drain line.
  14. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    Huh? As long as the laundry has it's own vent (which is must or else it's s-trapped) the red area is perfectly ok if the vent for the tub comes off at a nominally vertical angle.

    As for the bathroom group wet vent there is nothing wrong with what's he's drawn up.
  15. nhmaster3015

    nhmaster3015 Master Plumber

    Messages:
    836
    Location:
    The granite state
    Not by the 09 IPC it ain't. You can not have the wet vent running off a branch from the main line. In that particular drawing there is no vent for the tub if the lav is draining
  16. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    He's from Canada and falls under NPC of Canada. Not the IPC.
  17. krow

    krow Plumber

    Messages:
    906
    Location:
    Ontario, Canada
    The only thing that I find questionable is the section in the green circle. The 2 fixtures are not both draining in the same vertical continuous waste and vent.

    That's the way I interpret the code anyway

    Attached Files:

  18. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    You mean the tub and the sink? If so then what you quoted from the code book wouldn't apply because they're not both wet venting fixtures. Only the lav is a wet venting fixture.

    The code clause you quoted is referring to a system where you have to wet vented fixtures draining into a vertical soil or waste stack, or branch, or w/e and they are connected at the SAME vertical elevation you must connect them with a double fitting.

    There is only one vertical portion of piping that is wet vented and that's from the sink.
  19. krow

    krow Plumber

    Messages:
    906
    Location:
    Ontario, Canada
    The qouted clause refers to 2 wet venting fixtures venting 1 fixture, in this case the toilet. The tub needs to be seperately vented and the lav becomes the wet venting fixture for the toilet.(as the latter part of the qoute states), that is the way I am interpreting it.
  20. Doherty Plumbing

    Doherty Plumbing Journeyman & Gas Fitter

    Messages:
    810
    Location:
    Penticton, BC
    Krow not to be argumentative but how would you wet vent a bathroom group in a basement then?
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