Question 58

Horizontal copper tube with a 1 1/2 inch diameter must be supported at a maximum interval of 6 feet.

In accordance with plumbing codes, horizontal copper tubes of this size must be supported at a maximum interval of 6 feet to ensure structural integrity and prevent sagging or damage.

A) 5 feet

While supporting a copper tube at 5 feet is adequate, it is not the maximum allowable interval. This option would provide more frequent support than is required, which may be unnecessarily excessive.

B) 6 feet

This option is correct as it aligns with the plumbing codes that specify a maximum support interval of 6 feet for horizontal copper tubes with a diameter of 1 1/2 inches. This regulation ensures that the tubing is adequately supported without excessive strain.

C) 10 feet

Supporting the tube at a 10-foot interval exceeds the maximum requirement and could lead to structural issues such as sagging or potential failure of the joints over time. Thus, this option is incorrect.

D) 12 feet

Similar to option C, a 12-foot support interval is too far apart for a 1 1/2 inch diameter copper tube. It does not comply with the necessary standards for support, making this option incorrect.

Conclusion

The correct answer is 6 feet, as it is the maximum distance allowed for supporting horizontal copper tubes of the specified diameter. The other options either provide insufficient support or exceed the recommended intervals, which could compromise the integrity and functionality of the plumbing system.