What is the primary purpose of a water hammer arrestor?

A water hammer arrestor is a device installed in plumbing systems to absorb the shock that occurs when water flowing through pipes is suddenly stopped, which can happen when a valve is quickly closed. The primary purpose of a water hammer arrestor is to prevent pipe damage caused by this shock wave, also referred to as water hammer.

The rapid change in pressure can lead to significant stresses on the pipework, potentially resulting in leaks, burst pipes, or other kinds of structural failure. By providing a cushion of air or a spring mechanism, the arrestor absorbs the pressure surge, thereby protecting the integrity of the plumbing system.

While a water hammer arrestor might indirectly contribute to reducing noise and enhancing the overall efficiency of the system by promoting smoother water flow, its fundamental design and function directly relate to safeguarding the plumbing infrastructure from damage caused by sudden pressure changes.