Alabama Contractors License Practice Exam

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What is the maximum hanger horizontal spacing for PEX tubing in hydronic piping applications?

1.5 feet
2 feet
3 feet
4 feet

The correct answer is: 2 feet

The maximum hanger horizontal spacing for PEX tubing in hydronic piping applications is correctly identified as 2 feet. This spacing is crucial because it ensures that the tubing is supported adequately to prevent sagging or bending, which can lead to stress on the joints and fittings. Proper support helps maintain the integrity of the system and prevents potential leaks or other failures. Maintaining this spacing is also important to accommodate the thermal expansion and contraction of the PEX material when water is heated or cooled. By allowing for proper support every 2 feet, installers can ensure that the tubing remains secure and functional throughout its use. In contrast, options that suggest greater distances, such as 3 feet or 4 feet, do not provide the necessary support for PEX tubing and could lead to operational issues. Spacing that is too wide may not adequately support the weight of the tubing or account for the movement caused by temperature changes, ultimately resulting in system inefficiencies or damage. Therefore, adhering to the maximum spacing guidelines is essential for ensuring a reliable and efficient hydronic piping system.