Drainage, Waste & VentQuestion 111 of 360
In a wet-vented bathroom group, a wet-vent section carrying 4 DFU must be at least what size?
a.1-1/4 inch
b.1-1/2 inch
c.2 inch
d.3 inch
Explanation
For wet venting, a section carrying 3 to 4 DFU must be at least 2 inches. Sections carrying 1 to 2 DFU may be 1-1/2 inch. A 1-1/4 inch pipe is below the wet-vent minimum, and 3 inches is larger than required for 4 DFU.
Law Reference: 2022 California Plumbing Code (CPC) §908.0Practice all 360 questions free — no signup required.
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