Toilet Shower Sink drain venting, Canada
I am relocating my bathroom and the new setup will have: from basement 3" waste stack running up to basement ceiling then horizontal 18' to the front of the house into wye 3x3x2 to pick up shower then 4' into wye 3x3x3 to pick up toilet then into wye 3x3x2 to pick up sink then 3" to 2" to vent up the wall to roof.
4' between shower and toilet.
sink 3-4' from 3"
3" runs directly under shower and toilet bewtween floor joist.
Is it ok to vent this way?