Drainage, Waste & VentQuestion 94 of 360
For a 4 inch trap arm, the maximum developed length to the vent is:
a.6 feet
b.10 feet
c.8 feet
d.12 feet
Explanation
A 4 inch trap arm may run a maximum developed length of 10 feet to its vent, the longest listed. Six feet is the limit for a 3 inch arm. Eight and twelve feet are not the listed maximum for a 4 inch trap arm.
Law Reference: 2022 California Plumbing Code (CPC) §1002.2Practice all 360 questions free — no signup required.
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