A plumbing vent pipe is required to be installed from a fixture serving a lavatory. Which of the following is the minimum size required for the vent pipe?

ICC P1 exam practice question · Vents

A plumbing vent pipe is required to be installed from a fixture serving a lavatory. Which of the following is the minimum size required for the vent pipe?

A1/2 inch
B3/4 inch
1 inch
D1 1/4 inch

Exam tip

Always refer to the specific fixture's section in the code for the required vent pipe size.

Why C is correct

According to Section P2904.1.1 of the 2024 International Residential Code, the vent pipe size for fixtures serving lavatories shall be not less than 1 inch.

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A plumbing vent pipe is required to be installed from a fixture serving a lavatory. Which of the following is the minimum size required for the vent pipe?

A plumbing vent pipe is required to be installed from a fixture serving a lavatory. Which of the following is the minimum size required for the vent pipe?

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