I do not understand this vent system. Any thoughts.
Thanks
Looks fine to me but I’m not a CMI 
WHAT AN ***!!! I guess you know everything there is. I have never in 8 years seen anything like this. Why? can’t anyone give a straight answer. Maybe it was not racist or political enough. I am glad never had to count on you in a firefight.
I would if I knew, but I ain’t ever seen one like that either.
Thanks!!! Larry. Only one vent out the roof.
Get some skin will yah.
It’s just a rough-in for a sink shower and toilet.
They need a dry vent and that’s why it looks strange to you.
Thanks!!! Larry. Only one vent out the roof.