Bradford White UCG100H199 Installation & Operation Manual page 17

Clearance to combustibles for all venting pipes and terminals
For installations in the US
0" minimum
DO NOT place insulation or other materials in the required clearance spaces between the venting to
combustible material unless otherwise specified.
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 ft (1.5 m) of vertical run and
every 3 ft (.92 m) 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 UCG(80,100)H399
MODELS
CAUTION
Figure 4 – Typical Horizontal Intake Vent System
For installations in the CANADA
Refer to vent pipe and terminal manufacturer's
installation instructions for clearances to
17
combustibles