An individual vent is permitted to vent two traps or trapped fixtures as a common vent. The traps or trapped fixtures being common vented shall be located on the same floor level.
18-29-908.2 Connection at the same level.
Where the fixture drains being common vented connect at the same level, the vent connection shall be at the interconnection of the fixture drains.
18-29-908.3 Connection of different levels.
Connections at different levels shall not be permitted.