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Vertical Installation:
Vertical venting must be supported every 5 feet (1.5 m) of vertical run and every 3 feet (.9 m) of horizontal run of vent pipe
length.
Stress levels in the pipe and fittings can be significantly increased by improper installation. If rigid pipe clamps are used to
hold the pipe in place, or if the pipe cannot move freely through a wall penetration, the pipe may be directly stressed, or high
thermal stresses may be formed when the pipe heats up and expands. Install accordingly to minimize such stresses.
Failure to properly support the vent piping with hangers and clamps may result in damage to the water
heater or venting system.
Figure 16. Typical Horizontal Power Vent System
CAUTION
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