Venting Question

[boneman438]

I'm doing a full bathroom remodel, definitely not my first, and I've got a venting question.

The bathroom is in the corner of the house under the gable end (the soil stack is located in the corner where the ceiling height is shortest). I need to vent the lav and tub and I know that I can take the vent up and out the roof, but as I just got a brand new roof I'm reluctant to go punching holes in it. My question is can I take the vent up and over the window and back down to tie into the stack while still in the interior of the house?

I hope the diagram makes more sense than my words do...

Any help is much appreciated.

Steve

 

[phishfood]

Yes, as long as all parts of the vent are pitched back towards a drain.

Use 2" for the pipe to the tub and lavatory, much better practice.