Wet venting toilet

[paradoxum]

Greetings,

Great forum. I'm in the midst of a basement bathroom reno. According to what I found on this forum and elsewhere I can wet vent the WC via a 2" pipe running to the sink if the toilet trap arm is within 72" of the vent. Now, is that distance to the vertical portion of the vent, or any portion of what can be considered a vent? Please see attached pic. I ran a 3" pipe upstream of where my WC arm connects to allow for lots of air volume. I'm at 72" from point A to point D on my picture. Downstream of point A is a 4" sewer pipe. Technically speaking, does my vent for the WC start at point A or B?

Thanks in advance!

 

[Terry]

How you have it, the lav wet vents the toilet.

 

[Sponsor]

 

[paradoxum]

How you have it, the lav wet vents the toilet.

Yup and there will be a 1 1/2" dry vent going up to the ceiling from the lav (then horizontal run with 1/4" rise to the stack). Do you think I'm ok the way things are (according to code)?

 

[paradoxum]

For anyone looking for the same info in the future. According to these links, the Ontario code does not limit the length of wet vents:

http://www.buildingcode.online/1076.html
https://www.jaytechplumbing.com/2013/01/wet-venting/

"(l) the length of the wet vent is not limited."

Someone correct me if I'm wrong, but in my scenario from the toilet flange to point A is my trap arm. From point A to point B is the distance to my wet vent (about 3 feet). Based on UPC code distance/diameter requirements, my setup should be fine.

UPC Code

2" shower trap arm, 60" to vent
1.5" tub trap arm, 42" to vent.
1.5" trap arm for lav, 42" to vent.
3" trap arm, 72" to vent.
4" trap arm, 120" to vent, except for a toilet which would still be 72".

 

[xasm]

My understanding was that you aren't allowed to have a flat vent in Ontario...the portion from FtoC would be considered a flat vent in this case. Why not use the vent for the lav as the wet vent as well for the shower?

Tim

 

[Cacher_Chick]

"C" to "F" is a bad design and a quick inspection fail here.