Owner`s manual

Step 6. Once the pipe sections have been joined and run up through the roof, slip a pipe support strap over the
exposed sections. Bend the support straps outwards and push the pipe support strap down to the roof level.
Use a level to make sure the pipe is vertical and tighten the clamp around the pipe section. With roong
nails, secure the support straps to the roof and seal the nail heads with non-hardening mastic. Trim the
excess length of the straps. If the installation is taking place in a nished house the pipe support straps can
be attached to the rafters in the attic. See gures 21 and 22.
Step 7. Slip the ashing over the pipe section protruding from the roof and secure the base of the ashing with
roong nails. Use a non-hardening sealant on the nail holes and the edges of the ashing. On a sloped
roof, make sure the shingles overlap the top edge of the ashing.
Step 8. Continue to add pipe sections until the height of the vent cap meets the minimum code requirements (see
Table 1). In high winds, nearby trees, adjoining roof lines, steep roof pitches, and other similar factors can
result in poor draft or down drafting. In these cases, increasing the vent height may solve the problem.
Step 9. Slip the storm collar over the pipe and push it down to the top of the ashing. Use the non-hardening
sealant around the joint between the pipe and the storm collar.
Step 10. Twist on the vent cap until it locks.
Initial Installation
QUALIFIED INSTALLERS ONLY
19
NOTES:
1. If an offset is necessary to avoid obstructions in the attic,
the vent pipe must be supported every 3ft (91.4cm) (see gure
22).
2. Whenever possible, use two 45° elbows rather than two
90° elbows, as the 90° elbows tend to restrict the ow of ue
gases.
3. For multi-story installations, a ceiling re stop is required
at the second oor and any subsequent oors. The opening
should be a framed 10in (25.4cm) x 10in (25.4cm) hole.
4. Any areas above the rst oor, including closets and storage
spaces which the vent passes through, must be enclosed.
The enclosure can be framed and sheet rocked with standard
building materials. All minimum clearances must be maintained.
Do not ll any of the required air spaces with insulation.
plumber’s
strap
Figure 22. Pipe Support