DuraVent FasNSeal Single-Wall - Manual (Page 9)

Wall Thimble Installation
OUTSIDE
BUILDING
SURFACE
INSIDE
BUILDING
SURFACE
PART B
PART A
TO TERMINATION TO APPLIANCE
9.0” + 3.0”
1.5”
1.0”
2” x 6” STUD
(COMBUSTIBLES)
9
Category II, III, or IV appliances) of no less
than 1/4” (6.4mm) every 12” (305mm) to
prevent collection of condensates, formation
of ice build up, or blockage at any location
within the assembly. Refer to appliance
manufacturer’s installation instructions for
further details regarding the installation of
condensate drain fittings and the pitch
of the system.
•Use non-combustible hanger straps a
minimum of every 6’ (1.8m) to support the
vent system from ceiling joints or other solid
structures. Do not puncture the vent system!
1. Determine the location and install the
Wall Thimble so that a continuous minimum
slope of 1/4” per foot is maintained in any
horizontal portion of the vent system.
Condensate must flow freely and may not
be retained in any part of the vent system.
2. Cut the opening for the Wall Thimble
to allow the spacer tabs protruding from
the outer plate to sit comfortably within
the opening. (See Figure 4, Wall Thimble
Installation diagram)
3. Position Part A into the opening so that the
gasketed end of the Wall Thimble is located
on the outside of the structure.
Figure 4
4. Apply a bead of silicone between the two
surfaces and around the edges before nailing
or screwing the plate on Part A to the outside
of the structure.
5. From the inside, slide the sleeve of Part B
onto the sleeve of Part A until Part B’s plate
is flush against the inside structure surface.
Fasten with screws or nails.
IMPORTANT
6. Use a Termination Tee or a Birdscreen to
finish the system’s exterior.
7. When the vent system must pass through
an interior wall, use a FasNSeal Wall Pass
Through (FSWPT). Cut the same size hole for
the FSWPT as was cut for the Wall Thimble
and install using the same method.
8. Assemble FasNSeal® from the appliance
towards the Wall Thimble. Refer to “joint
Connections” in these installation instructions
for procedure.
Do not drill through or penetrate any part
of the vent system.
When terminating through a
non-combustible wall, the wall thimble
is optional.