Exhaust gases are vented outdoors through a separate vent duct or through a separate chamber of the same pipe this requires a double wall vent duct.
Water heater single wall vent.
For gas fired water heater vents.
An exception is made for non combustible walls such as solid masonry or concrete.
Direct vent water heaters.
Instead both systems typically expel exhaust through a pipe that runs outside through an exterior wall.
6 minimum clearance from single wall vent pipe or flue vent connector to any combustible material.
Apollopex corrugated the 3 4 in.
With a direct vent system air for combustion is drawn from a vent pipe that runs through an exterior wall or the roof.
The difference is that a power vent water heater pulls in combustion air from the space.
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After applying pipe thread tape to the mnpt nipples on your water heater thread the fnpt end of the water heater connector onto the tank and tighten with.