Question 8

Maximum spacing allowed between hangers on a 4-inch PVC drain routed horizontally through a basement ceiling is 4 feet.

For a 4-inch PVC drain, the maximum spacing allowed between hangers is 4 feet, ensuring proper support and minimizing the risk of sagging or damage.

A) 3 feet

While 3 feet is within acceptable limits for spacing, it does not reflect the maximum allowable distance. Therefore, it is not correct in the context of this question.

B) 4 feet

This is the correct answer as it aligns with the established guidelines for supporting 4-inch PVC drains. Maintaining this spacing ensures the structural integrity and functionality of the drainage system.

C) 5 feet

This option exceeds the maximum spacing recommendations for 4-inch PVC drains. Spacing hangers at 5 feet could lead to insufficient support, increasing the risk of sagging and potential damage.

D) 6 feet

Like option C, 6 feet is too far apart for proper support of a 4-inch PVC drain. Such spacing could compromise the system's effectiveness and cause structural issues over time.

Conclusion

The correct maximum spacing of 4 feet between hangers for a 4-inch PVC drain is essential for ensuring adequate support and preventing sagging. All other options either fall short of or exceed the maximum requirements, highlighting the importance of adhering to specified guidelines in plumbing installations.