What is the maximum spacing for support of a 1.5 inch horizontal pipe?

The maximum spacing for the support of a 1.5-inch horizontal pipe is 12 feet. This guideline is established in plumbing codes to ensure proper support and stability of the piping system. Adequate support is essential to prevent sagging, movement, or damage to the pipe, which can lead to leaks or system failures over time.

By providing support every 12 feet, the weight of the pipe, any potential contents, and external forces are distributed effectively, which maintains the integrity of the plumbing system. In practical applications, this spacing helps to ensure that the plumbing remains functional and minimizes the risk of plumbing issues.

While other options may suggest greater distances, they do not conform to standard practices or codes which prioritize structural reliability in plumbing installations.