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2. The location of the horizontal vent termination on an
exterior wall must meet all local and national building
codes, and must not be easily blocked or obstructed.
Refer to Pages 10 and 11 for proper Termination Clear-
ances.
For installations requiring a vertical rise on the exterior of
the building, 14" (356 mm) and 36" (914 mm) tall snorkel
terminations are available. (Figure 27) Follow the same in-
stallation procedures as used for standard horizontal termi-
nations. If the snorkel termination must be installed below
grade level, (i.e. basement application), proper drainage
must be provided to prevent water from entering the snorkel
termination. (Figure 28) Do not attempt to enclose the snor-
kel within the wall or any other type of enclosure.
Figure 27
ST979
simpson snorkel
8/07
Figure 28
St980
Step 4. Position the horizontal termination cap in the center
simp snork drain
of the square framed hole, and attach to the exterior wall
8/07
with the four (4) wood screws provided. Before attaching
the vent termination cap to the exterior wall, run a bead of
non-hardening silicone sealant around the outside edges to
make a seal between the cap and the wall. The arrow on the
vent cap should be pointing up. Ensure proper clearances
to combustible materials are maintained. (Figure 29)
18
NOTES:
1. The four (4) wood
2. For buildings with
Snorkel
12" (305 mm)
Minimum
4"
(102 mm)
Snorkel
12" (305 mm)
Minimum
4" (102 mm)
Figure 30
IMPORTANT: You must attach the four (4) pieces of the
new vinyl siding standoff to the horizontal termination
cap in specific order to ensure a weather tight fit. Loosely
assemble the four parts, in order, around the base of the
horizontal termination cap. Place the first of four pieces
along the upper edge of the cap, then using two (2) screws
per side, secure each piece to the pre-drilled holes along
both sides of the cap, finally, attach the final piece to the
bottom edge of the cap. Tighten all screws and mount cap,
with all four (4) pieces attached, directly onto the wall with
the four (4) 2
screws
provided
should be replaced
with
appropriate
fasteners for use
on
brick,
block,
concrete or other
types of sidings.
vinyl
siding
or
stucco,
another
component
must
be used between
the
horizontal
termination cap and
the
wall
surface.
The
vinyl
siding
standoff
prevents
excessive heat from
Figure 29
possibly
melting
the vinyl siding material. Vinyl siding standoffs are not
required with snorkels. For vinyl wall installations a
4-piece vinyl siding standoff should be assembled and
installed between the horizontal termination cap and the
exterior wall. (Figure 30) The vinyl should be cut away to
the outer edges of the assembled standoff.
Cut Back
Siding
Sconce
Cap
ST982
simp vinyl sidind
8/07
⁄
" (64 mm) screws provided. (Figure 30)
1
2
Wood
Screws
HOT
ST981
SIMP termination
8/07
4 pc. Vinyl Siding
Standoff
Wood Screws
(4 Req.)
Round
Cap
Wood Screw
20012761
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