Rheem PowerVent Series Use & Care Manual page 19

NOTICE: Follow the CAN/CSA B149.1 and vent system manufacturer's installation instructions for
proper installation of the vent system.
Vent Pipe
From
Water Heater
Pipe Coupling
Min. 18"(46 cm)
Above Roof
Min. 12"(30.5 cm)
Above Anticipated
Snow Level.
Max. 24"(61 cm)
Above Roof (Without
Additional Support)
2' x 2' (60 cm x 60cm)
Sheet Metal Shield
on Brick or Masonry
Surface Recommended
* Vent Terminal with
1/2" Mesh Protective
Screen Inside
6"
(15 cm)
12"
(30 cm)
Outside of
Building Wall
Insert 1/2" Mesh Protective
Screen Inside Terminal Elbow
Short Piece of Vent Pipe
Vent Pipe
Through Roof
Elbow
Vent Terminal
Vertical Vent Installation
Once the vent terminal location has been
determined, make a hole through the roof
and interior ceiling to accommodate the
vent pipe.
Complete the vent pipe installation to the
water heater's vent connector fitting on the
blower outlet.
Support vertical or horizontal lengths as
previously mentioned.
Install adequate flashing where the vent
pipe passes through the roof.
Horizontal Vent Installation
Once the vent terminal location has been determined, make a
hole through the exterior wall to accommodate the vent pipe.
Vent pipe must exit exterior wall horizontally only.
Insert a small length of vent pipe through the wall and connect
the coupling as shown to the left.
Place the 1/2" mesh metal screen inside the terminal fitting
and connect it as shown to the vent pipe on the exterior of the
building.
Complete the rest of the vent pipe installation to the water
heater's vent connector fitting on the blower outlet.
If necessary support horizontal run as previously mentioned.
Vertical Vent Termination Location
The location of the vent terminal depends on the following
minimum clearances and considerations (see illustration):
Minimum eighteen (18) inches (46 cm) above roof.
Minimum twelve (12) inches (30.5 cm) above anticipated
snow level.
Maximum twenty-four (24) inches (61 cm) above roof level
without additional support for vent.
Four (4) feet (1.2 cm) from any gable, dormer or other roof
structure with building interior access (i.e., vent, window,
etc.).
Within (6) feet (1.8 m) of a mechanical air supply inlet.
Determine the vent terminal height and cut
vent pipe accordingly. Refer to the above
section for proper vent terminal height.
Connect vent elbow onto vertical pipe
through roof.
Connect short piece of vent pipe
(approximately 3" (7.6 cm) long) to
elbow, then insert 1/2" mesh metal screen
into terminal elbow and join it to the short
piece of vent pipe.
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