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Heat & Glo • PIER/ST/L&RCOR-HVB-CE • 2068-900 Rev. H • 6/0728
4. Install Firestops
For Horizontal Runs - Firestops are REQUIRED on both
sides of a combustible wall through which the flue passes.
NOTE: Model DVP-TRAP does not need an exterior
firestop on an exterior combustible wall. The firestop is
built into the cap.
To install firestops for horizontal runs that pass through either
interior or exterior walls:
• Cut a 10” x 12” (254mm X 305mm) hole through the wall.
NOTE: The center of the hole is one (1) inch (25.4mm)
above the center of the horizontal flue pipe.
• Position the firestops on both sides of the hole previ-
ously cut and secure the firestops with nails or screws.
• The heat shields of the firestops MUST BE placed to-
wards the top of the hole.
• Continue the flue run through the firestops.
Figure 19. 10" x 12" Hole and Flue Pipe
Figure 20. Heat Shield, Interior & Exterior Firestops
TRIM HEAT
SHIELD IF TOO
LONG, ADD TO
SHIELD IF TOO
SHORT
EXTERIOR
FIRESTOP
INTERIOR
FIRESTOP
HEAT SHIELD
3. Install Support Brackets
Refer to Cinch Pipe and Termination Cap installation in-
structions.
2. Continue Adding Flue Components
Refer to Cinch Pipe and Termination Cap installation in-
structions.
• Continue adding flue components, locking each succeed-
ing component into place.
• Ensure that each succeeding flue component is secure-
ly fitted and locked into the preceding component in the
flue system. Securing pipe sections with a maximum of
two screws is recommended.
• 90° elbows may be installed and rotated to any point
around the preceding component’s vertical axis. If an el-
bow does not end up in a locked position with the pre-
ceding component, attach with a minimum of two (2)
sheet metal screws.
NOTE: There must be NO INSULATION or other
combustibles inside the framed firestop opening.
10"
12"
INTERIOR
WALL SHIELD
For Vertical Runs - One ceiling firestop is REQUIRED at
the hole in each ceiling through which the flue passes.
To install firestops for vertical runs that pass through ceilings:
• Position a plumb bob directly over the center of the verti-
cal flue component.
• Mark the ceiling to establish the centerpoint of the flue.
• Drill a hole or drive a nail through this centerpoint.
• Check the floor above for any obstructions, such as wir-
ing or plumbing runs.
• Reposition the fireplace and flue system, if necessary, to
accommodate the ceiling joists and/or obstructions.
• Cut an 10-inch X 10-inch (254mm x 254mm) hole through
the ceiling, using the centerpoint previously marked.
• Frame the hole with framing lumber the same size as the
ceiling joists.
Figure 21. Hole & New Framing Members
CEILING
NEW
FRAMING
MEMBERS
EXISTING CEILING
JOISTS
CHIMNEY
HOLE
10" (254mm)
10" (254mm)