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Optima 45 - 3 16
NOTE:
• Galvanized pipe is desirable above the roofline
due to its higher corrosion resistance. Continue
to add pipe sections throughout the flashing until
the height of the vent cap meets the minimum
height requirements specified in Fig. 5 or local
codes.
• For steep roof pitches, the vertical height must
be increased. A poor draft, or down drafting can
result in high wind conditions, trees or neighbor's
roof lines. In these cases increasing the height
may solve a drafting problem. REMEMBER to
check that you are within the maximum vertical
height restrictions, and are placing the appropri-
ate vent restrictors as outlined in the venting
chart within this manual.
• Any storage spaces or closets which the vent
must pass through must be enclosed.
Flat to 7/12 2 Feet 0.61 Meters
Over 7/12-8/12 2 Feet 0.61 Meters
Over 8/12-9/12 2 feet 0.61 Meters
Over 9/12-10/12 2.5 Feet 0.76 Meters
Over 10/12-11/12 3.25 Feet 1.00 Meters
Over 11/12-12/12 4 Feet 1.22 Meters
Over 12/12-14/12 5 Feet 1.52 Meters
Over 14/12-16/12 6 Feet 1.83 Meters
Over 16/12-18/12 7 Feet 2.13 Meters
Over 18/12-20/12 7.5 Feet 2.29 Meters
Over 20/12-21/12 8 Feet 2.44 Meters
Roof Pitch Minimum Vent Height
Vertical Termination
Cap
Storm Collar
Flashing
Ceiling Firestop
Round Support
Box/wall Thimble
Length of Pipe
Length of Pipe
SDA-U adaptor
VENTING - VERTICAL TERMINATION USING SIMPSON DURA-VENT PIPE
Simpson Dura-Vent venting
components are listed on page 21
Typical Vertical venting
configuration using Simpson
Dura-Vent Direct Vent System
Fig. 5
H-represents vent
height
H