[JD22314]

I`m doing a plumbing job on new construction. Owner wants to use studer valves instead of through the roof vents for the whole house. I plan to run the vent pipes into the attic
And put the studer vents on there. This is a two bath and kitchen and washer box.
Will this be OK in Tenn.

If not what's the best way to cut vent holes in a metal roof?

[speedball1]

You'll have to check local codes in your area for the answer. Some will allow AAV's and some some won't. Check with your Building Deptment. If you would like a opinion, let me state that we use AAV's when it's impossible to run a regular vent. As with any mechanical devise there's the very real possibility that they will go bad in time. That can't happen with a regular vent. If for no other reason I would try to talk the home owner out of the idea. Good luck, Tom