Drainage, Waste & VentQuestion 96 of 360
A cleanout is required where an aggregate horizontal change of direction in a drainage line exceeds:
a.45 degrees
b.90 degrees
c.22-1/2 degrees
d.135 degrees
Explanation
A cleanout is required where the aggregate horizontal change of direction exceeds 135 degrees, because sharp cumulative bends collect debris and are hard to rod through. Smaller thresholds such as 45 or 90 degrees would require far more cleanouts than the code intends, and 22-1/2 degrees is a single-fitting angle, not the aggregate limit.
Law Reference: 2022 California Plumbing Code (CPC) §707.4Practice all 360 questions free — no signup required.
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