11
20307393
5" x 8" DVP Termination Kit
FP1973
flex pipe bend
UL1777
Flex Vent
5" Radius
Figure 17 Minimum Radius for Flex Vent Section
NOTE: Flex vent pipe spacers: Refer to
manufacturer’s specifications for correct
positioning of the spacer springs to maintain
proper distance between inside and outside pipe.
Install the Ceiling Firestop
• Frame an opening 10 in. x 10 in. (254 mm x 254 mm)
whenever the vent system penetrates a ceiling/floor
(see Figure 18)
• Frame the area with the same sized lumber as used in
ceiling/floor joist.
• When installing a top vent vertical termination appliance
the hole should be directly above the appliance, unless
the flue is offset.
• The ceiling firestop may be installed above or below
the ceiling. Refer to Figure 19.
• Secure with three fasteners on each side.
• Do not pack insulation around the pipe. Insulation must
be kept away from the pipe.
• The gap between the vent pipe and firestop may be
sealed.
Figure 18 Installing Ceiling
Firestop
3 fasteners
per side
Ceiling firestop
installed below ceiling.
Ceiling firestop
installed above ceiling.
Install attic insula-
tion shields before
or after installation
of vent system.
Figure 19 Installing Ceiling Firestop & Attic Insulation Shield
Install Attic Insulation Shield
Attic Above
10 in. (254 mm)
Hole should measure
10 in. x 10 in.
inside to inside
10 in. (254 mm)
WARNING
FIRE RISK. DO NOT allow loose materials or insu-
lation to touch vent. VCG/HHT REQUIRES
the use of
an attic shield.
The National Fuel Gas Code ANSI Z223.1 requires an
attic shield constructed of 26 gauge minimum metal
that extends at least 2 in. (51 mm) above insulation.
Attic shields must meet specified clearance and be
secured in place.
