Hi i am in the process of replaceing my plumbing in my house, my question is if i install a bathroom in my basement do i have to vent the sink sepreatly or can i stack vent it? The sink is less than 12 feet from the stack, do i also have to vent the upstairs sink or is it ok to be stack vented like the existing system? my other question is what size should a floor drain be? I am from ontario canada
Thank bill