A syphon breaker is a device designed to prevent the formation of a vacuum in plumbing systems, which can lead to siphoning and potential water damage. It works by allowing air to enter the system when the pressure drops, thus breaking the siphon effect. This mechanism is crucial in maintaining proper water flow and preventing backflow issues. Understanding its function is essential for effective plumbing design and maintenance. Implementing a syphon breaker can enhance system reliability and safety.