Core TradesQuestion 28 of 700
A cleanout on a 4-inch drain line must have a MINIMUM clearance in front of it for rodding of about:
a.12 inches
b.18 inches
c.24 inches
d.30 inches
Explanation
Cleanouts serving pipes 3 inches and larger require about 18 inches of clearance so a rodding tool can be inserted. 12 inches applies to smaller pipe, and 24 or 30 inches exceed the required minimum.
Law Reference: 2025 CA Plumbing Code (CPC) Chapter 7 (Cleanouts)Practice all 700 questions free — no signup required.
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