Air Admittance Valve Sizing

Size air admittance valves (AAV) for individual and branch venting applications.

Fixture units served by AAV.
DFU
1=individual fixture, 2=fixture group, 3=branch.

Results

AAV Size-inches
Max DFU Capacity-DFU
Conventional Vent Req-
References: Based on UPC Section 918 and IPC Section 917 AAV requirements per ASSE 1051