I'm remodeling my bathroom. The main problem I have is that all my fixtures (toilet, sink, and shower) will exceed the maximum distance from trap to vent; therefore, I have to install new vents. Let’s take the toilet for example. Its 12' from the soil stack/vent. I was going to run a tee off the fixture arm, extend a vent vertical about 5 or 6 inches, then using an elbow run it horizontal about 1.5 feet to the base of the wall. I would then run the vent vertical through the wall and into the attic where I'd run it horizontal to the main vent. Is this acceptable?