www.fmiproducts.com
124387-01D
13
VENTING INSTALLATION USING FMI
PRODUCTS, LLC VENTING SYSTEM
FMI PRODUCTS, LLC chimney system
consists of 12", 18", 24", 36" and 48" snap-
lock, double-wall pipe segments, planned
for maximum adaptability to individual site
requirements.
WARNING: The opening in
collar around chimney at top of
fireplace must not be obstructed.
Never use blown insulation to fill
chimney enclosure.
Figure 13 - Chimney Pipes and
Accessories
Hemmed
End
8" Stainless
Inner Pipe
12
3
/
8
"
Galvanized
Outer Pipe
PART NO.
DESCRIPTION
12-8DM
Pipe Section
18-8DM
Pipe Section
24-8DM
Pipe Section
36-8DM
Pipe Section
48-8DM
Pipe Section
RT-8DM
Round Termination
RTL-8DM
Round Termination
RLT-8DM
Round Termination
RTT-8DM
Round Termination with Slip
Section
RTTL-8DM
Round Termination with Slip
Section
RLTT-8DM
Round Termination with Slip
Section
ET-8DM
Square Chase-Top
ETO-8DM
Square Chase-Top with Mesh
ETL-8DM
Square Chase-Top with Slip
Section
ETLO-8DM Square Chase-Top with Mesh &
Slip Section
60E-8DM
60° Offset and Return
VENTING INSTALLATION
Continued
ASSEMBLY AND INSTALLATION OF
DOUBLE WALL CHIMNEY SYSTEM
Each double wall chimney section consists of
a galvanized outer pipe, a stainless steel in-
ner flue pipe and a wire spacer. Pipe sections
must be assembled independently as chimney
is installed. When connecting chimney directly
to fireplace, inner flue pipe section must be
installed first with lanced side up. Outer pipe
section can then be installed over flue pipe
section with hemmed end up. Press down
on each pipe section until lances securely
engage hem on fireplace starter. The wire
will assure proper spacing between inner and
outer pipe sections.
Opening in collar around
chimney at top of fireplace must
not be obstructed. Never use
blown insulation to fill chimney
enclosure.
Continue to assemble chimney sections as
outlined, making sure that both inner and outer
pipe sections are locked together. When install-
ing double wall snap-lock chimney together, it
is important to assure joint between chimney
sections is locked. Check by pulling chimney
upward after locking. Chimney will not come
apart if properly locked. It is not necessary to
add screws to keep chimney together.
FIRESTOP SPACERS (3600FS-8DM-1)
Firestop spacers are required at each point
where chimney penetrates a floor space.
Their purpose is to establish and maintain
required clearance between chimney and
combustible materials. When pipe passes
through a framed opening into a living space
above, firestop must be placed onto ceiling
from below as shown in Figure 14.
Figure 14 - Firestop Spacer with Living
Space Above Ceiling
If area above is a living space, install
firestop below framed hole.
