TheZster
Member
I have a 4" stack with a bathroom on the first floor draining into it. I want to add a bathroom in what used to be the attic - directly above the existing first floor bathroom.
Can I tie in a new 3" line from the new bathroom into the existing stack "above" the first floor toilet without a separate vent for the first floor toilet? Or do I need to bust out concrete and connect the new system "below" the existing first floor bath? The new addition will have it's own vent system...
If possible/necessary - I have plenty of room to add a vent line right above the existing toilet - between the existing toilet and the planned addition (4X4X3 Y)....
Can I tie in a new 3" line from the new bathroom into the existing stack "above" the first floor toilet without a separate vent for the first floor toilet? Or do I need to bust out concrete and connect the new system "below" the existing first floor bath? The new addition will have it's own vent system...
If possible/necessary - I have plenty of room to add a vent line right above the existing toilet - between the existing toilet and the planned addition (4X4X3 Y)....