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VERTICAL OR HORIZONTAL VENTING USING
SECURE FLEX
KITS AND COMPONENTS
Secure Flex venting kits and components may
be used in any venting application where rigid
Secure Vent (SV4.5) direct vent components
can be used. All restrictions, clearances and
allowances that pertain to the rigid piping apply
to the flexible venting. Secure Flex kits may
not be modified; also, under no circumstances
may separate sections of flex pipe be joined
together. Secure Flex kits may be added to the
end of a vent run made up of rigid Secure Vent
(SV4.5) vent sections provided that doing so
does not violate any of the venting length,
height, routing, horizontal to vertical ratio re-
quirements or clearance considerations de-
tailed in this manual.
Secure Flex kits come with an included adapter
that can be fitted to the appliance collar or the
inclined channel end of the last Secure Vent
(SV4.5) vent section in a rigid system in the
exact same fashion as any other Secure Vent
section. Align the dimpled end of the adapter
over the previously installed section or appli-
ance collar, adjusting the radial alignment until
the four locking dimples of the adapter are
aligned with the inlets of the four incline chan-
nels of the last vent section or collar. Push on
the adapter until it fully engages, then twist the
adapter clockwise running the dimples down
and along the incline channels until they seat at
the end of the channels.
Attach the flexible vent to the adapter as
follows (see also Figure 42):
A. Install the Inner Flex Pipe -
1. Install the small gear clamp loosely around
the inner flexible vent pipe, push it back out of
the way.
2. Apply a bead of Mill-Pac Black (700 F)
high temperature sealant - Catalog No.
10K81) to the inner adapter collar, approxi-
mately
inch from the end.
3. Pull and extend the inner flexible vent pipe.
4. Slide the inner flex pipe over the adapter
collar. Ensure the flexible vent pipe completely
engages the adapter collar to a distance of 1
inches from the end, and that it is free from
damage or tears.
5. Slide the gear clamp down and tighten it fully to
secure the flexible vent to the adapter inner collar
approximately
inch from the end of the flex.
6. Install three screws 120 degrees apart
through the flexible vent pipe and into the
adapter collar just below the gear clamp to
provide additional security to the connection.
NOTE: OUTER PIPE IS PULLED AWAY TO
SHOW THE DETAIL OF THE INNER PIPE
Apply ONLY MIL-PAC BLACK HIGH
TEMPERATURE SEALANT (Catalog No.
10K81) to the outside surface of both
collars of the adapter (be especially
careful to fill the grooves of the outer
collar to be covered by the flexible
pipe) and slide flexible pipe over
inner and outer adapter collars.
1
in. (44 mm)
Flexible Pipe and
Adapter Outer
Collar Overlap
Adapter
(SV4.5RF)
Figure 42
B. Install the Outer Flex Pipe -
1. Install the large gear clamp loosely around
the outer flexible vent pipe, push it back out of
the way.
2. Apply a bead of Mill-Pac Black (700 F) high
temperature sealant - Catalog No. 10K81) to
the outer adapter collar; to the grooves of the
collar which extend approximately 1 inch from
the end and to the flat surface, approximately
1
inches from the end.
3. Pull and extend the outer flexible vent pipe.
4. Slide the outer flex pipe over the adapter
collar. Ensure the flexible vent pipe completely
engages the adapter collar to a distance of 1
inches from the end, and that it is free from
damage or tears.
5. Slide the gear clamp down and tighten it
fully to secure the flexible vent to the adapter
outer collar approximately
end of the flex.
6. Install three screws 120 degrees apart
through the flexible vent pipe and into the
adapter collar just below the gear clamp to
provide additional security to the connection.
C. Route Flex Vent -
Ensure that the flex vent is properly routed to
provide the required clearance. Do Not allow
the flexible vent to bend in a radius tighter than
5" (127 mm). Refer to Figure 43 . Support
horizontal sections of flex with metal straps at
2 foot (0.61 m) intervals.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Attach Adapter to Appliance
Collar, or Secure Vent Sections
D. Install Firestop/Spacers at ceilings and walls -
When Secure Flex penetrates a wall or ceiling,
a firestop/spacer is required: use the SF4.5 BF
firestop/spacer for ceilings and the SF4.5 HF
firestop/spacer for walls. See the appropriate
sections and figures shown throughout the
venting section for their installation requirments.
SF-12 or SF-18 Flexible Vent Section
Figure 43
E. Attach Flex Vent to Termination -
Secure Flex components can be purchased
inch from the
separately and attached to bulk lengths of
Secure Flex flexible tubing cut to size at the
job site. Secure the flexible vent to the Secure
Flex terminations in the same manner (see
Figure 42) as it was attached to the adapter.
Note: Secure Flex vent must be attached to
Secure Flex terminations only. DO NOT
substitute Secure Vent terminations or the
Secure Vent adapter for Secure Flex compo-
nents. The collars of Secure Flex termina-
tions and adapters have a different circum-
ference than that used with the Secure Vent
pipe. Additionally, Secure Flex components
have an extended length center tube for use
in attaching the flexible vent.
FLEX VENT
SECURING SCREW
(3 PLACES EQUIDISTANT
JUST BELOW GEAR CLAMP)
GEAR
CLAMPS
1
in. (44 mm)
Flexible Pipe and
Adapter Inner
Collar Overlap
SECURING SCREW
(3 PLACES EQUIDISTANT
JUST BELOW GEAR CLAMP)
5" (127 mm)
Radius Minimum
19
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