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VENT INSTALLATION
REAR (THROUGH-THE-WALL) APPLICATIONS (continued)
4. Apply a bead of non-hardening mastic around the outside edge
of vent cap. Position the vent cap in the center of hole on the
exterior wall with the word "HOT" on the vent cap facing up.
Insure proper clearance of 1" to combustibles is maintained to
the flue. Attach the vent cap with four wood screws supplied.
See Figure 13.
Do not recess vent
termination into any
wall. This will cause a
fire hazard.
NOTE: Replace the wood screws with appropriate
fasteners for stucco, brick, concrete, or other types of
siding.
A vinyl siding standoff (part #950) must be used with the Simpson/
Selkirk Horizontal Termination (part #985) on vinyl, stucco or wood-
clad exterior walls. Apply non-hardening mastic around outside edge
of the standoff instead of the vent cap assembly. See Figure 14.
5. Slide the firestop over the vent pipe before connecting the hori-
zontal run to the vent cap. See Figure 15.
6. The termination should overlap the flue a minimum of 11/4".
Apply silicone to the outer pipe/termination connection. Fasten
termination with screws provided.
7. Slide the firestop against the interior wall surface and attach with
screws. See Figure 15.
Apply
Mastic to all
Four Sides
Figure 14 - Installing Simpson/Selkirk Vinyl
Siding Standoff and Termination
18
Cut Vinyl Siding
Away to Fit Standoff
Standoff #950
T
H O
Nut
Wood Screw
Bolt
Apply Mastic to
all Four Sides
Figure 13 - Installing Horizontal Termination
Vent Cap
(Horizontal
Termination)
Simpson
Termination
#985
H O
Inerior Wall
Surface
Screw
Figure 15 - Installing Firestop on
Horizontal Vent Pipe
Vent Cap
T
Wood Screw
Firestop
Horizontal
Vent Pipe
74D0010
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