18
Vertical Vent System
This section applies to vertically vented two-pipe vent systems in addition to the instructions provided under
“General”. All venting and drain components, except for condensate traps, are provided by others.
Vertical vent systems terminate vertically up. Install a Tee fitting with drip leg and cleanout trap as shown in
Figure 12. Vent and combustion air piping must be terminated as shown in Figure 12.
Figure 12 – Indoor Vertical Venting
Side Discharge
Top Discharge
Note: When single wall galvanized pipe is used for air pipe, joints must be sealed with silicone sealant
and/ or metallic tape.
Figure 13 – Vertical Vent Termination