I am finishing my basement and plan on adding a wet bar, shower, sink
and toilet. I am going to have to dig into the basement floor to add
the drains and I am have figured out how to do that. I know I need to
vent all 4 of them. I cannot use a Air Admittance Valve because of
I have found a 2 inch vent that come off of a bathroom on the 1st
floor and heads up through the roof. My question is if I can put a tee
on that vent with a 90 degree turn down and run it down to the
basement and use it? Is there a limit on how many sinks, toilets,
showers a 2 inch vent can handle?
Also, once that vent pipe is in the basement can I just run it through
the joists to the places I need it? I assume I can just run the vent
pipe along the ceiling and put tees when I need to run to the drain
vents that I run up through the basement floor? Is there any sloping
requirements for long runs of vents? The bathroom will be about 25
feet from where the vent comes down from upstairs.
Any feedback on if this would work would be great. Thanks for your