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11
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Framing Dimensions for Roof
Pitch C D
0/12 10¹⁄₂ in. 10¹⁄₂ in.
(267 mm) (267 mm)
6/12 10¹⁄₂ in. 12 in.
(267 mm) (305 mm)
12/12 10¹⁄₂ in. 17 ³⁄₄ in.
(267 mm) (451 mm)
SV4.5E90
(90° Elbow)
8 ¹⁄₈"
(206 mm)
Swivel Joint
(360
°
swivel)
4 ¹³⁄₁₆"
(122 mm)
SV4.5E45
(45° Elbow)
Swivel Joint
(360
°
swivel)
C
D
Storm
Collar
Figure 19
Figure 20
Figure 22
Figure 21
Figure 18
K. Install the vertical termination - The final
step involves installation of the SV4.5CGV-1
Vertical Termination. Extend the vent sections to
the height as shown in the "Vertical vent termina-
tion section" on page 5. The SV4.5CGV-1 Verti-
cal Termination (
Figure 22
) installs in the exact
same fashion as any other Secure Vent section.
Align the termination over the end of the previ-
ously installed section, adjusting the radial align-
ment until the four locking dimples of the termi-
nation are aligned with the inlets of the four
incline channels of the last vent section. Push the
termination down until it fully engages, then twist
the termination clockwise running the dimples
down and along the incline channels until they
seat at the end of the channels.
I. Install the roof flashing - Extend the vent
sections through the roof structure. Install the
roof flashing over the vent section and posi-
tion such that the vent column rises vertically
(use carpenters level) (
Figure 20
). Nail along
perimeter to secure flashing or adjust roofing
to overlap the flashing edges at top and sides
only and trim where necessary. Seal the top
and both sides of the flashing with waterproof
caulking.
If the vent system extends more than 5' (1.5 m)
above the roof flashing, stabilizers may be
necessary. Additional screws may be used at
section joints for added stability. Guide wires
may be attached to the joint for additional
support on multiple joint configurations.
G. Continue installation of horizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step C. Install support straps
every 5' (1.52 m) along horizontal/inclined vent
runs using conventional plumber’s tape.
It is
very important that the horizontal/inclined
run be maintained in a straight (no dips) and
recommended to be in a slightly elevated
plane, in a direction away from the fireplace
of ¹⁄₄" rise per foot (20 mm per meter) which is
ideal, though rise per foot run ratios that are
smaller are acceptable all the way down to at or
near level. Use a carpenter’s level to measure
from a constant surface and adjust the support
straps as necessary.
It is important to maintain the required clear-
ances to combustibles: 1" (25 mm) at all sides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.
H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart and
Figure 19.
J. Install the storm collar - Install the storm
collar, supplied with the flashing, over the vent/
flashing joint. See
Figure 21.
Loosen the storm
collar screw. Slide collar down until it meets the
top of the flashing. Tighten the adjusting screw.
Apply non-combustible caulking or mastic
around the circumference of the joint to pro-
vide a water tight seal.
Loop the tape around the vent, securing the
ends of the tape to the framing. If desired,
sheet metal screws #6 x ¹⁄₂" length may be
used to secure the support straps to the vent
pipe. Refer to
Figure 17.
F. Change vent direction to horizontal/inclined
run - At transition from or to a horizontal/
inclined run, install the SV4.5E45 and SV4.5E90
elbows in the same manner as the straight vent
sections. The elbows feature a twist section to
allow them to be routed about the center axis of
their initial collar section to align with the re-
quired direction of the next vent run element.
Twist elbow sections in a clockwise direction
only so as to avoid the possibility of unlocking
any of the previously connected vent sec-
tions. See
Figure 18.