What is the maximum distance allowed for the last support hanger on a fire sprinkler branch of 1-1/2 inch nominal pipe size from the end?

In fire sprinkler systems, supporting the piping correctly is crucial to ensure the integrity and performance of the system. For a branch line with a nominal pipe size of 1-1/2 inches, the maximum distance allowed for the last support hanger from the end of the pipe is set to maintain stability and prevent sagging or movement during operation or maintenance activities.

A distance of 60 inches is specified to ensure that the piping is adequately supported without risking damage or misalignment, especially given that the weight of water and the piping system itself can exert significant stress. This distance balances the need for support with practical installation considerations. Furthermore, it aligns with industry standards and safety codes that govern the installation of fire protection systems, ensuring that these systems function properly in emergency situations.

Compliance with this requirement helps maintain a safe and effective fire suppression system, emphasizing the importance of proper installation techniques and adherence to regulations throughout the plumbing and fire safety industry.