mrordinary
Member
The plumber and I were trying to figure out how to vent a bathroom in the basement with an aav.
Option
1. Figure a way to go into 1st floor closet, then try to 45 degree into the attic crawlspace to the existing roof vent. It would be very difficult
2. Cut through the joists in the ceiling. The problem is that each joist is 7 3/8 and we need to drill out 2 9/16. That hole is slightly too big to drill out by code. (Not sure if it is allowed if the joist is a thicker joist from 1929.
3. He came up with an idea he could run a vent from under the slab, but the sink would need an aav.
There was 4 inch cast iron in the trench that now has 3 inch pvc.
At the top of the 3" sewer is the 2 inch vent for the shower and toilet.
See pic.
I then read about spill zones after he left.is this setup code?
Option
1. Figure a way to go into 1st floor closet, then try to 45 degree into the attic crawlspace to the existing roof vent. It would be very difficult
2. Cut through the joists in the ceiling. The problem is that each joist is 7 3/8 and we need to drill out 2 9/16. That hole is slightly too big to drill out by code. (Not sure if it is allowed if the joist is a thicker joist from 1929.
3. He came up with an idea he could run a vent from under the slab, but the sink would need an aav.
There was 4 inch cast iron in the trench that now has 3 inch pvc.
At the top of the 3" sewer is the 2 inch vent for the shower and toilet.
See pic.
I then read about spill zones after he left.is this setup code?