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Vermont Castings Majestic Products DV360/580 Series

20002261

Step 5

Measure the horizontal length requirement including a
2” (51mm) overlap, i.e. from the elbow to the outside
wall face plus 2” (51mm) (or the distance required if
installing a second 90

elbow). (Fig. 32)

Always install horizontal venting on a
level plane.

Step 6

Use appropriate length of pipe sections - telescopic or
fixed - and install. The sections which go through the
wall are packaged with the starter kit, and can be cut to
suit if necessary.

Sealing vent pipe and firestop gaps with high
temperature sealant will restrict cold air being
drawn in around fireplace.

Step 7

Apply high temperature sealant to 4” (102mm) and 7”
(178mm) collars or the termination one inch away from
crimped end. Guide the vent terminations 4” and 7”
collard into their respective vent pipes. Double check
that the vent pipes overlap the collars by 2” (51mm).
Secure the termination to the wall with screws provided
and caulk around the wall plate to weatherproof. As an
alternative to screwing the termination directly to the
wall, you may also use expanding plugs or an ap-
proved 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” (152mm)
beyond the outer face of the wall.

Support horizontal pipes every 36”
(914mm) with metal pipe straps.

FP1182

Fig. 32 Horizontal length requirement.

Below Grade Installation

When it is not possible to meet the required vent
terminal clearances of 12” (305mm) above grade level,
a snorkel kit is recommended. It allows installation
depth down to 7” (178mm) below grade level. The 7”
(178mm) is measured from the center of the horizontal
vent pipe as it penetrates through the wall.

Ensure the sidewall venting clearances are ob-
served. If venting system is installed below ground,
we recommend a window well with adequate and
proper drainage to be installed around the termina-
tion area.

If installing a snorkel, a minimum 24” (610mm) vertical
rise is necessary. The maximum horizontal run with the
24” vertical pipe is 36” (914mm). This measurement is
taken from the collar of the fireplace (or transition
elbow) to the face of the exterior wall. See the Sidewall
Venting Graph for extended horizontal run if the verti-
cal exceeds 24” (610mm).

1. Establish vent hole through the wall (Fig. 29)

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. 33)

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. 33)

Zero Clearance Sleeve
(if required)

Firestop

7" Pipe