Example A: Typical Horizontal Termination
w/ 7/8” per foot DOWNWARD Slope
13
Installing the water heater:
94° Elbow
Outer
Wall
Inner Wall Plate
Water
Heater
Outside Wall
Side View
Caulk for
weather seal
Inner Wall
Outer Wall Plate
Vent
Pipe
Mounting
Brackets
Appliance
Vent Adapter
Side View
WARNING: Use UL
approved Category III vent
termination material only.
No other vent material is
permitted.
CAUTION: Follow the
vent manufacturer’s
installation instructions as
design might vary from
manufacturer to
manufacturer.
downward slope
7/8" per foot
Ceiling
Vent Pipe
Wall Plates
Board
Inspection
Fire
Stop
Access Panel #1
Inspection
Access
Panel #2
2’
(61 cm)
Max.
94° Elbow
Horizontal Vent Installation continued.
Use 4 hollow wall anchors, at least 1/8
inch (0.32 cm) in diameter and of
appropriate length for the thickness of
the sheathing, if sheathing is particle
board or other composite material.
Use 4 #10x1-1/4” wood screws for
plywood, solid wood sheathing or
members. Use suitable masonry anchors
when passing through solid masonry
walls. Reinstall the decorative sheathing
around the faceplate. This assembly may
be painted to match the exterior decor.
Apply silicone sealant or silicone/latex
caulk around the vent section where it
passes through the plate and around the
plate where it is attached to the
structure. This will provide a weather
seal to keep moisture outside the
building. Ensure a sufficient seal is
made. Now attach the male end of the
horizontal vent termination to the female
end of the 3”/5” concentric vent pipe.
Push firmly on the horizontal vent
termination until the outer vent pipe has
made contact with the snap ring located
on the female end of the 3”/5”
concentric vent pipe section. When
fully assembled the outer female end
will overlap the male end 1 inch (25.4
mm).
Use the self-tapping screws provided
with the vent kit to connect the two
outer pipes.
Seal the over lapping area of the outer
pipe (5” concentric pipe) with a thick
bead of caulk.
Install the appliance adapter onto the
appliance and use (4) four screws to
secure the appliance adapter to the
appliance. Now attach other required
vent and air intake material between the
appliance adapter and the horizontal
vent termination.
Maintain the proper clearance between
the vent pipe and combustible or non-
combustible material as required by the
vent manufacturer.
There is a 1” (2.5 cm) minimum
clearance required between the vent pipe
and combustible or non combustible
material.
Proper support should be provided for
the vent pipes as mentioned in the
venting section.
Support method used should isolate the
vent pipe from floor joist or other
structural members to help prevent the
transmission of noise and vibration.
Do not support, pin, or otherwise secure
the venting system in a way that restricts
the normal thermal expansion and
contraction of the chosen venting
material.
