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Page 24
VERTICAL TERMINATIONS (CONT.)
USING GS SERIES PIPE (CONT.)
Step 7. Continue to assemble pipe sections until the height of the vent cap (H) (Figure 15) meets the
minimum code requirements described in code requirements as outlined in the current CAN/
CGA-Bl49 Installation Codes (in Canada), the National Fuel Gas Code NFPA 54/ANSI Z223.1
(in USA), or local codes. Note that for steep roof pitches, the vent height must be increased. In
high wind conditions, nearby trees adjoining rooflines, steep pitched roofs, and other similar
factors can result in poor draft, or down drafting. In these cases increasing the vent height may
solve this problem.
Step 8. Twist-lock the vent cap and seal.
NOTE:
(1) For multi-story vertical installations, a ceiling firestop (SDV part #963) is required at the second
floor, and any subsequent floors (Figure 16). The opening should be framed to 10” x 10” (254mm
x 254mm) inside dimensions, in the same manner as shown in Figure 13.
(2) Any occupied areas above the first floor, including closets and storage spaces, which the vertical
vent passed through must be enclosed. The enclosure may be framed and sheetrocked with
standard construction materials; however, refer to these installation instructions for the minimum
allowable clearance between the outside of the vent pipe and the combustible surfaces of the
enclosure. Do not fill any of the required air space with insulation.
FIG. 15
FIG. 16