Using tables from the National Fuel Gas Code or our Sizing & Application Guide, determine the diameter of venting required. The Sizing & Application Guide also offers tips on good design including multi-appliance system sizing and design. The System Design and Installation Guide is an additional resource.
The round flashing is available in galvanized and aluminum models flat to 6/12 pitch (Standard), as well as for steeper pitches of 7/12 to 12/12, 13/12 to 18/12, and 19/12 to 24/12.
Part No. Galvanized | Part No. Aluminum | Size | Pitch | (A) Skirt |
---|---|---|---|---|
6F | 6PL-AF | 6" | Std. Flat to 6/12 | 4" |
6FFU | 6PL-AFFU | 6" | Flat to 6/12 | 6" |
6FFU12 | 6PL-AFFU12 | 6" | 7/12 to 12/12 | 6" |
6FFU18 | 6PL-AFFU18 | 6" | 13/12 - 18/12 | 6" |
6FFU24 | 6PL-AFFU24 | 6" | 19/12 - 24/12 | 6" |
8F | 8PL-AF | 8" | Std. Flat to 6/12 | 4" |
8FFU | 8PL-AFFU | 8" | Flat to 6/12 | 6" |
8FFU12 | 8PL-AFFU12 | 8" | 7/12 to 12/12 | 6" |
8FFU18 | 8PL-AFFU18 | 8" | 13/12 - 18/12 | 6" |
8FFU24 | 8PL-AFFU24 | 8" | 19/12 - 24/12 | 6" |