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Section P3104 Vent Connections and Grades

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P3104.1 Connection
Individual branch and circuit vents shall connect to a vent stack, stack vent or extend to the open air.
Exception: Individual, branch and circuit vents shall be permitted to terminate at an air admittance valve in accordance with Section P3114.
P3104.2 Grade
Vent and branch vent pipes shall be graded, connected and supported to allow moisture and condensate to drain back to the soil or waste pipe by gravity.
P3104.3 Vent Connection to Drainage System
A dry vent connecting to a horizontal drain shall connect above the centerline of the horizontal drain pipe.
P3104.4 Vertical Rise of Vent
A dry vent shall rise vertically to not less than 6 inches (152 mm) above the flood level rim of the highest trap or trapped fixture being vented.
P3104.5 Height Above Fixtures
A connection between a vent pipe and a vent stack or stack vent shall be made not less than 6 inches (152 mm) above the flood level rim of the highest fixture served by the vent. Horizontal vent pipes forming branch vents shall be not less than 6 inches (152 mm) above the flood level rim of the highest fixture served.
P3104.6 Vent for Future Fixtures
Where the drainage piping has been roughed-in for future fixtures, a rough-in connection for a vent, not less than one-half the diameter of the drain, shall be installed. The vent rough-in shall connect to the vent system or shall be vented by other means as provided in this chapter. The connection shall be identified to indicate that the connection is a vent.

Related Code Sections

Section 905 Vents, Vent Connections and Grades
Vent and branch vent pipes shall be so graded and connected as to drain ...
Section P3104 Vents, Vent Connections and Grades
Vent and branch vent pipes shall be graded, connected and supported to allow moisture and condensate ...
Section P3104 Vents, Vent Connections and Grades
Vent and branch vent pipes shall be graded, connected and supported to allow moisture and condensate ...
P3104.1 Vents, Connection
Individual branch and circuit vents shall connect to a vent stack, stack vent or extend to the open air. Exception: Individual, branch and circuit ...
905.3 Vents, Vent Connection to Drainage System
Every dry vent connecting to a horizontal drain shall connect above the centerline of the horizontal drain pipe ...