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10002428
Vermont Castings, Majestic Products DVRT36/39/43
Do not backfill around snorkel.
A clearance of at least 4” (102mm) must
be maintained between the snorkel and
the soil.
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel.
Fasten brackets to wall first, then secure to snorkel
with self-drilling #8 x 1/2 sheet metal screws. For a
recessed foundation wall, it is necessary to extend
vent pipes out as far as the protruding wall face. (Fig.
32)
Vertical Through-the-Roof Application
If installing a snorkel, a minimum 24” (610mm) vertical
rise is necessary. The maximum horizontal run with the
24” (610mm) vertical pipe is 36” (915mm). This mea-
surement is taken from the collar of the fireplace (or
transition elbow) to the face of the exterior wall. Refer
to the Sidewall Venting Graph for extended horizontal
run if the vertical exceeds 24” (610mm).
1. Establish vent hole through the wall. (Page 17, Fig.
27)
2. Remove soil to a depth of approximately 16”
(406mm) below base of snorkel. Install drain pipe.
Install window well (not supplied). Refill hole with
12” (305mm) of coarse gravel, leaving a clearance
of approximately 4” (102mm) below snorkel. (Fig.
31)
3. Install vent system.
4. Ensure a watertight seal is made around the vent
pipe coming through the wall.
5. Apply high temperature sealant caulking (supplied)
around the 4” and 7” snorkel collars.
6. Slide the snorkel into the vent pipes and secure to
the wall.
7. Level the soil so as to maintain a 4” (102mm)
clearance below snorkel. (Fig. 31)
This Gas Fireplace has been approved for:
• Vertical installations up to 40’ (12m) in height. Up to
a 10’ (3m) horizontal vent run can be installed within
the vent system using a maximum of two 90°
elbows. (Fig. 33)
Max. Height 40’
(12.2m)
Min. Height 8’
(2.4m)
Max. 10’ (3m)
Support Straps
every 3’
(914mm)
Max. 10’ (3m)
Max. Height 40’
(12.2m)
Min. Height 8’
(2.4m)
FP1183
Fig. 33 Support straps for horizontal runs.
Watertight
Seal Around
Pipe
Foundation
Recess
Sheetmetal screws
Wall screws
Snorkel
CFM139
Fig. 32 Snorkel installation, recessed foundation.
CFM112
Fig. 31 Below grade installation.
Gravel
Drain
Firestop
Foundation Wall
Window Well
7TDVSNORK
(snorkel)
Ground
24"/608mm
Minimum*
7" Pipe
Screws
Minimum
4" Clearance
Zero Clearance
Sleeve If Required
*A minimum of 24” (610mm)
vertical pipe must be installed
when using the 7TDVSNORK