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10002823/0 DVR33 17
Vermont Castings, Majestic Products
of the exterior wall. See the Sidewall Vent Graph for extended
horizontal run if the vertical exceeds 24”.
1 Establish vent hole through the wall (Fig. 22).
2 Remove soil to a depth of approximately 16" (405 mm)
below base of snorkel. Install drain pipe. Install window
well (not supplied). Rell hole with 12" (305 mm) of
coarse gravel leaving a clearance of approximately 4"
(100 mm) below snorkel. (Fig. 27)
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" (100 mm) clearance
below snorkel. (Fig. 27)
DO NOT BACK FILL AROUND SNORKEL.
A CLEARANCE OF AT LEAST 4” MUST BE
MAINTAINED BETWEEN THE SNORKEL
AND THE SOIL
Step 7
Apply high temperature sealant to 4" (100 mm) and 7" (175
mm) collars or the termination one inch away from crimped
end. Guide the vent terminations 4" and 7" collars into their
respective vent pipes. Double check that the vent pipes over-
lap the collars by 2" (50 mm). Secure the termination to the
wall with screws provided and caulk around the wall plate
to weatherproof, Fig. 26. As an alternative to screwing the
termination directly to the wall you may also use expanding
plugs or an approved exterior construction adhesive. You may
also attach the termination with screws through the inner body
into the 4" vent pipe however for this method you must extend
the 4" pipe approximately 6" (150 mm) beyond the outer face
of the wall.
Support horizontal pipes every 3' (91 cm) with metal pipe
straps.
Check replace to make sure it is levelled and properly posi-
tioned.
BELOW GRADE INSTALLATIONS
When it is not possible to meet the required vent terminal
clearances of 12" (305mm) above grade level a starter vent
kit is recommended. It allows installation depth of down to
7" (178mm) below grade level. The 7" is measured from the
centre of the horizontal vent pipe as it penetrates through the
wall.
If venting system is installed below ground, we
recommend a window well with adequate and
proper drainage be installed around the termi-
nation area.
Ensure sidewall vent termination clearances are
observed.
If installing a snorkel a minimum 24" (610 mm) vertical rise
is necessary. The maximum horizontal run with the 24" (610
mm) vertical pipe is 36" (915mm). This measurement is taken
from the collar of the replace (or transition elbow) to the face
If the foundation is recessed, use recess brackets (not supplied)
for securing lower portion of the snorkel. Fasten brackets to
wall rst and then secure to snorkel with self-drilling #8 x 1/2
sheet metal screws. It will be necessary to extend the vent
pipes out as far as the protruding wall face (Fig. 28).
Fig. 26
Fig. 27
Fig. 28