41
INSTALLATION INSTRUCTIONS
Horizontal Vent Installation (cont.)
Fasteners will vary depending on the wall type.
For particle board or
composite sheathing, use
4 hollow wall anchors. The
anchors should be at least
1/8 in. (0.3 cm) in diameter
and the appropriate length for
the sheathing thickness.
For plywood or solid wood
sheathing or members, use 4
#10 x 1 1/4-in. wood screws.
For masonry walls, use
suitable masonry anchors
long enough to pass through
the wall.
NOTICES:
• The exhaust vent terminal must extend a minimum of
12 inches (30.5 cm) more than the air intake terminal
from the exterior wall.
• T o prevent possibility of condensate freeze-up, do
not install vent kits one above the other.
Once the vent terminal location has been determined,
make holes through the exterior wall to accommodate
the vent pipes. Vent pipes must exit exterior wall
horizontally only.
The standard horizontal air intake termination is a
2-inch or 3-inch pipe which terminates at the exterior
wall and uses a coupling to prevent the pipe from
being pushed back into the structure. The standard
horizontal exhaust outlet termination is a 2-inch or
3-inch pipe which terminates 12 inches from the air
intake termination. Insert a small length of vent pipe
through the wall and connect the coupling. Connect
vent cap or terminal to the vent pipe on the exterior of
the building.
1. Observe minimum clearances. Vent terminals must
be a minimum of 5.5 inches (14 cm) and a maximum
of 24 inches (61 cm) apart horizontally.
2. Cut two 2 1/2" (6.4 cm) diameter holes (for a 2" [5.1-
cm] diameter pipe) or 3 1/2" (8.9 cm) diameter holes
(for a 3" [7.6-cm] diameter pipe) for the exhaust
vent and air intake openings.
Apply silicone sealant or silicone/latex caulk to
seal the vent pipe to the vent cap to permit field
disassembly for annual inspection and cleaning.
Completely seal where it passes through the wall
plate and where it is attached to the structure.
Attach the female end of the next vent pipe section
to the male end of the 2-in./3-in. (5.1-cm/7.6-cm)
vent pipe. See “Cementing Joints” on page 40.
Complete the rest of the vent pipe installation to
the water heaters's flue outlet and air intake.
1
3
2
Venting
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