NM CID MM-1 Practice Questions - New Mexico CID MM-1 Plumbing Examination Exam

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An isometric of a public toilet room shows eight floor-outlet water closets on one horizontal branch with a single vent rising between the two most upstream trap arms. Under UPC 2021 Section 911, that vent is a circuit vent and shall be not less than:

1-1/4 inches in every case The same size as the water-closet trap arm, with no table check 2 inches, and increased per Table 703.2 if the circuit-vented DFU load requires it 4 inches because eight closets always need a 4 inch vent

Correct Answer:

2 inches, and increased per Table 703.2 if the circuit-vented DFU load requires it

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