Master Plumber Practice Exam

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Prepare for the Master Plumber Exam. Use practice questions, flashcards, and detailed explanations. Ace your test with confidence!

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How frequently must PEX piping installed horizontally be supported?

48 inches
24 inches
36 inches
32 inches

The correct answer is: 32 inches

The correct answer is based on the requirements outlined in plumbing codes. PEX piping that is installed horizontally must be supported at intervals of 32 inches. This support is necessary to prevent sagging and movement, which could lead to stress on the joints and fittings, potentially resulting in leaks and system failures. The 32-inch support interval helps ensure that the horizontal runs of PEX are neatly aligned and stable, which is crucial for maintaining the integrity of the plumbing system over time. The spacing guidelines are developed to accommodate the flexibility of PEX and consider factors like temperature changes, expansion, and contraction. By adhering to these specifications, plumbers can ensure a reliable and durable installation that meets industry standards.