Water Hammer is a phenomenon that occurs in plumbing systems when a fluid in motion is suddenly forced to stop or change direction. This abrupt change creates a pressure surge, resulting in a loud banging noise in pipes. It often happens when valves are closed quickly, causing the water to slam against the closed valve. The effects of Water Hammer can lead to damage in pipes and fixtures over time. To mitigate this issue, homeowners can install water hammer arrestors, which are devices designed to absorb the shock and reduce the noise associated with the pressure surge.