Vent Stack Sizing Calculator

Size main vent stacks and stack vents based on drainage fixture units.

Fixture units on soil/waste stack being vented.
DFU
Total length of vent piping.
feet

Results

Vent Size-inches
Max DFU Capacity-DFU
Max Length Allowed-feet
References: Based on UPC Table 906.1 and IPC Table 916.1 vent sizing