Bradford White UCG100H199 Installation & Operation Manual page 16

Vent pipes serving power vented appliances are classified by building codes as "vent connectors". Required clearances
from combustible materials must be provided in accordance with information in this manual under LOCATION OF
WATER HEATER and CLEARANCES, and with National Fuel Gas Code and local codes.
Horizontal Installation
In a horizontal application, it is important that moisture is not to be allowed to buildup in the intake vent pipe. To prevent
this from happening, the pipe should be installed with a slight downward slope so the moisture will run back away from
the water heater. The vent system must be supported every 5 feet of vertical run and every 3 feet of horizontal run of vent
pipe length.
Failure to properly support the vent piping with hangers and clamps may result in damage to the water heater or venting
system.
WARNING! DO NOT USE 2"
VENT WITH UCG100H399
MODELS
CAUTION
Figure 4. Typical Horizontal Intake Vent System.
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