Vent Termination Below Grade

Jefferson Direct Vent/Natural Vent Gas Heater

6.Install the elbow using 3 sheet metal screws at each joint.

7.Measure, and cut if needed, the appropriate length of pipe section needed to make the connection through the wall. Include a 2” overlap; i.e. from the elbow to the outside wall face, about 2” or the dis- tance required if installing a second 90° elbow. (Fig. 25)

8.Slip the wall plate and trim collar over the interior end of the horizontal pipe and install into the wall sleeve. Seal the joint inside the wall plate if needed to keep cold air from being drawn into the home.

9.Connect the horizontal pipe to the elbow. Fasten the wall plate to the pipe with three sheet metal screws. Slide the trim collar up against the wall plate to cover the screws. (Fig. 26)

ST215

Fig. 25 Measure the horizontal length.

Seal Both

Terminal Ends

Caulk Plate Joint with	ST217
Weatherproof Sealant

Fig. 27 Install the vent terminal.

Install Snorkel Kit #7FSDVSKS when it is not possible to meet the required vent termination clearances of 12” (305 mm) above grade level. The snorkel kit will allow installation depth of down to 7” (178 mm) 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. 28)

NOTE: Be sure to maintain side wall clearances and vent run restrictions. Refer to Pages 7,8, 9, Figures 3, 4, 7, 8.

Wall

Sleeve

ST216

Trim Collar

Wall Plate

1.	Establish the vent hole through the wall.
2.	Remove soil to a depth of approximately 16” (406 mm)
	below the base of the snorkel. Install a window well
	(not supplied). Reﬁll the hole with 12” (305 mm) of
	coarse gravel and maintain a clearance of at least 4”
	(102 mm) below the snorkel. (Fig. 28)
3. Install the vent system as described on pages 15-18.
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.

Fig. 26 Install the horizontal pipe and wall plate parts.

10.For both CFM and DuraVent Systems: Install the vent terminal. (Fig. 27) Apply high temperature seal- ant one inch from the ends of the inner and outer collars. Guide the inner and outer vent termination collars into the adjacent pipes. Double check that the vent pipes overlap the collars by 2”. Fasten the termination to the wall with the screws provided, and caulk the joint with weatherproof sealant.

11.For CFM only: Install Charcoal Gray Pipe Rings (#7FSDRG) or Polished Brass Pipe Rings (#7FSDRP) at pipe joints, if desired.

6. Level the soil to maintain a 4” clearance below the

snorkel.

If the foundation is recessed, use extension brack-

ets (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. (Fig. 29)

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