Arizona Plumbing Practice Exam

What is the maximum distance the last support hanger on a fire sprinkler branch can be from the end of the pipe?

1. 24 inches

2. 30 inches

3. 36 inches

4. 48 inches

The correct answer is: 36 inches

The maximum distance that the last support hanger on a fire sprinkler branch can be from the end of the pipe is defined by safety and code requirements. Specifically, NFPA (National Fire Protection Association) standards provide guidelines that ensure the integrity and reliability of fire sprinkler systems. In this case, a distance of 36 inches is stipulated to support the pipe properly and maintain its structural integrity. This distance allows for effective load distribution and minimizes the risk of sagging or potential damage to the sprinkler system due to improper support. Adequate support is crucial for the functionality of the fire sprinkler system, ensuring that it operates effectively in case of an emergency. Understanding this standard also relates to aspects of installation best practices, which ensure that the sprinkler system can reliably function when needed, thus playing a key role in fire safety. Maintaining the specified distance helps prevent stress on the pipe, which can lead to leaks or failures in the system.