The valve operates through a hinged or spring-loaded mechanism, allowing fluid to pass through when the pressure is in the correct direction. However, when the flow attempts to reverse, the valve closes, preventing backflow and maintaining the desired direction of fluid movement. Check valves are indispensable in numerous applications, including plumbing systems, industrial processes, and water treatment plants. Their design variations, such as swing, lift, or ball check valves, cater to diverse operational needs. Check valves play a pivotal role in safeguarding pumps and preventing damage to sensitive equipment by ensuring fluid moves unidirectionally, contributing to the efficiency and reliability of fluid handling systems.