Drainage, Waste & VentQuestion 75 of 360
For a 3 inch trap arm, the maximum developed length to the vent is:
a.5 feet
b.8 feet
c.6 feet
d.10 feet
Explanation
A 3 inch trap arm may run a maximum developed length of 6 feet to its vent. The 5 foot value is for a 2 inch arm and 10 feet is for a 4 inch arm; 8 feet is not a listed value. Longer runs on this size require an additional or relocated vent.
Law Reference: 2022 California Plumbing Code (CPC) §1002.2Practice all 360 questions free — no signup required.
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