Drainage, Waste & VentQuestion 91 of 360
A 3 inch drain runs 48 feet at the minimum slope of 1/8 inch per foot. What is the total fall?
a.12 inches
b.3 inches
c.6 inches
d.9 inches
Explanation
Total fall equals 48 feet times 1/8 inch per foot = 6 inches. Twelve inches would be the fall at 1/4 inch per foot, which is steeper than the minimum. Three and nine inches do not match a 48 foot run at 1/8 inch per foot.
Law Reference: 2022 California Plumbing Code (CPC) §708.1Practice all 360 questions free — no signup required.
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