Master Plumber Practice Exam

Question: 1 / 400

How frequently must PEX piping installed horizontally be supported?

48 inches

24 inches

36 inches

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.

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