Drainage, Waste & VentQuestion 122 of 360
A vent penetrates a roof deck that is also used as a sun deck or walking surface. How high must the vent terminal extend above that roof?
a.6 inches
b.At least 7 feet (2134 mm) above the roof
c.3 feet
d.36 inches
Explanation
When a roof is used for purposes other than weather protection (such as a deck or garden), a vent must terminate at least 7 feet above the roof surface. This keeps sewer gases well above the breathing zone of people using the roof.
Law Reference: 2022 California Plumbing Code (CPC) §906.1Practice all 360 questions free — no signup required.
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