Burnham K2WTC Installation, Operating And Service Instructions page 40

VII. Venting
D. Design Requirements Unique to Split Vent Systems (continued)
FIRE STOP LISTED FOR
USE WITH VENT SYSTEM
PITCH 1/4" PER FT TOWARDS TRAP
PVC AIR
INTAKE PIPE
Figure 7.22: Split Rigid Vent System (Vent Options 11-14)
PVC AIR INTAKE PIPE
Figure 7.23: Split Vent System (Flex in B-Vent Chase) Vent Options 15-17)
107774-01 - 9/17
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