Drainage, Waste & VentQuestion 105 of 360
The horizontal drainage pipe between a fixture trap and its vent is called the:
a.Trap arm
b.Developed length
c.Crown weir
d.Fixture branch
Explanation
The horizontal pipe between the trap weir and the vent is the trap arm, and its maximum length is set by pipe size in the trap-to-vent table. Developed length is a general measurement term, the crown weir is the top inside of the trap, and a fixture branch collects multiple fixtures. Only trap arm names this specific segment.
Law Reference: 2022 California Plumbing Code (CPC) §1002.2Practice all 360 questions free — no signup required.
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