Enviro Ascot owner manual Initial Installation, Qualified Installers Only, Continue to add pipe

Initial Installation

QUALIFIED INSTALLERS ONLY

elbow strap down to the roof level, as shown in Figure 30. Tighten the clamp around the pipe section. Use a level to make sure the pipe is truly vertical. With roofing nails, secure the support straps to the roof. Seal the nails holes heads with non-hardening mastic. Trim the excess length of the support straps that extend out beyond the edge of the flashing.

7.Slip the flashing over the pipe section protruding through the roof. Secure the base of the flashing to the roof with roofing nails. Use a non-hardening sealant between the uphill edge of the flashing and the roof. Insure the roofing material overlaps the top edge of the flashing as shown in Figure 30. Verify that you have at least the minimum clearance to combustibles at the roof line.

8.Continue to add pipe

	Vertical	sections until the height
	Termination	of the	vent	cap		meets
Elbow Strap	Storm Collar	the	minimum			code
		requirements.			Refer		to
	Flashing	Figure 31 and Table 5.
		Note that for steep roof
		pitches, the vent height
	Roofing nails	must be increased.					In
		high	wind	conditions,
		nearby trees,			adjoining
		roof lines, steep pitched
		roofs,	and other			similar
		factors	can		result		in
		poor	draft,		or	down
		drafting. In these cases,
		increasing		the		vent
		height	may		solve		the
Figure 30: Vertical Vent Termination Installation.		problem.

9. Slip the storm collar over the pipe, and push it down	Table 5: Minimum ‘H’ for Figure 31.
to the top of the roof flashing as shown in Figure
	Roof Pitch	Minimum Height
30. Use the non-hardening sealant around the joint
between the pipe and the storm collar.		Feet	Meters
10. Twist-lock the vent cap.	Flat to 7/8	1	0.3
	Over 7/12 to 8/12	1.5	0.46
	Over 8/12 to 9/12	2	0.61
	Over 9/12 to 10/12	2.5	0.76
	Over 10/12 to 11/12	3.25	0.99
	Over 11/12 to 12/12	4	1.22
	Over 12/12 to 14/12	5	1.52
	Over 14/12 to 16/12	6	1.83
	Over 16/12 to 18/12	7	2.13
	Over 18/12 to 20/12	7.5	2.29
Figure 31: Height of Vertical Termination;	Over 20/12 to 21/12	8	2.44
Reference Table 5.

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