28
WHL-001 REV. 9.3.14
When installing a combustion air intake from outdoors, care must be taken to utilize uncontaminated combustion air.
NOTE: To
prevent combustion air contamination, see Table 1
– Contaminant Table
.
Take extra precaution to adequately support the weight of vent pipes terminating through the roof. Failure to properly support roof
terminated vent piping could result in property damage, serious personal injury, or death due to flue gas leakage.
Figure 8
– Sidewall Venting with Tee (Intake) and Coupling (Exhaust) - NOTE: This drawing is meant to demonstrate system
venting only. The installer is responsible for all equipment and detailing required by local codes.
All vent pipes must be glued, properly supported, and the exhaust must be pitched a minimum
of ¼” per foot back to the heater to allow
drainage of condensate. When placing support brackets on vent piping, the first bracket must be within 1 foot of the water heater and
the balance at 4 foot intervals on the vent pipe. Heater venting must be readily accessible for visual inspection for the first three feet
from the heater.
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