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Co-Axial Venting
Important Installer Notice – Weather Sealing & Vapor Barriers
It is the installer’s responsibility to ensure that vent installations through exterior walls are
caulked and weatherproofed in such a manner as to:
• Prevent rain water from entering the wall from the weather side by adequately caulking the
outer vent plate to the exterior wall surface.
• Prevent moisture inside the home from penetrating into the wall structure by ensuring the
inside wall plate is adequately sealed to the inside vapor barrier.
• Prevent rain water and moisture from entering the walls by sealing the joints between the
outer vent tube and the inner and outer wall plates.
We recommend the use of a high quality polyurethane sealant.
Co-Axial Venting Rear Vent with No Vertical Rise
The horizontal vent run cannot be extended by the use of any vent accessory pipes.
26” (660 mm) max.
vent length
(14” (356 mm) max.
enclosed within
combustible wall
cavity)
* raise the
appliance by
at least 1/2”
(13 mm) from
surface
of hearth
or floor finish in
front to allow
for air gap below
backing plate
23-1/8”
(587 mm)
from the
bottom of
appliance*
Use 835TG vent guard
with the 551DVK
termination located at
less than 7’ (2.13 m)
above ground
Rear vent—no vertical rise
Corner rear vent—no vertical rise
Approved
through wall
shield/thimble
Approved
side wall
termination
Vent pipe max.
15” (381 mm)
after 45° elbow
