Drainage, Waste & VentQuestion 100 of 360
The DFU value of a residential kitchen sink is:
a.1
b.3
c.4
d.2
Explanation
A residential kitchen sink is assigned 2 DFU with a 1-1/2 inch minimum trap. A value of 1 is for a lavatory, and 3 or 4 overstates a single kitchen sink. Correct DFU values ensure the connecting branch is neither undersized nor oversized.
Law Reference: 2022 California Plumbing Code (CPC) §702.0 (Table 702.1)Practice all 360 questions free — no signup required.
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