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4. Slip the wall cover over the interior end of the horizontal
pipe and install into the zero clearance sleeve. Seal the
joint inside the wall plate if needed to keep cold air from
being drawn into the home.
5. Install the vent terminal. (Figure 22) Guide the inner and
outer vent termination collars into the adjacent pipes.
Double check that the vent pipes overlap the collars by 2".
Fasten the termination to the outside wall with the screws
provided, and caulk the joint with weatherproof sealant.
6. Use wall straps to support vertical pipe runs at 4' (1219
mm) intervals.
Horizontal Installation
Step 1. Set the gas appliance in its desired location. Check
to determine if wall studs or roof rafters are in the way once
the venting system is attached. If this is the case, you may
want to adjust the location of the appliance.
Step 2. DirectVent Pro pipe and fittings are designed with
special twist-lock connections. To connect the venting
system to the appliance flue outlet, a twist-lock appliance
adaptor is built into the appliance at the factory. Assemble
the desired combinations of black pipe sections and elbows
to the appliance adapter with pipe seams oriented towards
the wall or floor, as much out of view as possible. (Figure
24)
Figure 24
NOTES:
1. Twist-lock procedure: Line up locking lugs on male and
female ends of pipe sections. Insert the male end of pipe
into the female end until the locking lugs are covered.
Twist the female end clockwise an eighth of a turn to lock
sections together. (Figure 25) Screws are not required to
secure the joint, but are acceptable provided they do not
penetrate the inner wall of the vent pipe.
17
St976
simp pipe
8/07
Figure 25
2. Horizontal vent runs of vent pipe must be supported to
prevent any downward sags. Horizontal pipe sections
should be supported at least every 4' (1.2 m). Wall straps
can be used for this purpose. Alternatively, plumbers
tape or other suitable noncombustible material can be
used to support the vent pipe.
3. DirectVent Pro venting requires no sealant.
Step 3. With the appliance adapter and pipe section
attached, slide the stove into its correct location. Mark
the wall for a square hole that measures 10" x 10" (254
x 254 mm). The centerline of the pipe should line up with
the center of the square hole. (Figure 26) Cut and frame
the square hole in the exterior wall where the vent will be
terminated. If the wall being penetrated is constructed of
noncombustible material only, i.e. masonry block, brick or
concrete only, a hole with zero clearance is acceptable.
Center of
Hole
C L
Figure 26
NOTES:
1. The horizontal run of venting must be level, or have a
1/4" (6 mm) rise for every 1' (305 mm) of run toward
the termination. Never allow the vent to run downward.
A downward slope can trap heat and become a possible
fire hazard.
ST977
simp twist lock
8/07
St977
simpson framing
8/07
20012761
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