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Vent Termination Below Grade
Install Snorkel Kit when it is not possible to meet the required vent termination clearances of 12"
(305mm) above grade level. The snorkel kit will allow installation depth of down to 7" (178mm)
below grade level. The seven inches is measured from the center of the horizontal vent pipe as it
penetrates the wall. If the venting system is installed below grade, a window well must be
installed with adequate and proper drainage. (Fig. 34)
NOTE: Be sure to maintain side wall clearances and vent run restrictions. Refer to Figures 3
through to 10.
1. Establish the vent hole through the wall.
2. Remove soil to a depth of approximately 16" (400mm) below the base of the snorkel. Install a
window well (not supplied). Refill the hole with 12" (305mm) of coarse gravel and maintain a
clearance of at least 4" (100mm) below the snorkel. (Fig. 34)
3. Install the vent system as described on previous pages.
4. Be sure to make a watertight joint around the vent pipe joint at the inside and outside wall
joints.
5. Apply high temperature sealant around the inner and outer snorkel collars. Join the pipes and
fasten the snorkel termination to the wall with the screws provided.
6. Level the soil to maintain a 4" clearance below the snorkel. If the foundation is recessed, use
extension brackets (not supplied) to fasten the lower portion of the snorkel. Fasten the brackets to
the wall first, and then fasten to the snorkel with self-tapping #8 x 1/2" sheet metal screws. Extend
the vent pipes out as far as the protruding wall face.
Masport Monterei Direct Vent Gas Fire
190
mm
13
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