Arizona Plumbing Practice Exam

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Prepare for the Arizona Plumbing Exam with quizzes, flashcards, and multiple-choice questions; each with detailed explanations and helpful hints.

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What is the minimum slope per foot permitted for a 3-inch building drain?

1/16 inch
1/8 inch
1/4 inch
1/2 inch

The correct answer is: 1/8 inch

The minimum slope permitted for a 3-inch building drain is 1/8 inch per foot. This specification ensures that wastewater flows adequately through the drain, minimizing the risk of clogs and backups. A slope that is too shallow may lead to the accumulation of solids, which can result in a blockage over time, while a slope that is too steep may cause the water to flow too quickly, preventing the solids from settling and being carried away properly. In plumbing codes, these slope requirements are established to maintain proper drainage performance and hygiene standards within the plumbing system. The 1/8 inch per foot slope is a balance that creates an efficient flow while also preventing issues related to drainage. Understanding these specifications is crucial for anyone involved in plumbing design and installation.