What system is a air break or air gap feature?

An air break or air gap feature is a Plumbing design used to prevent backflow of contaminated water into the potable water supply. It creates a physical separation between the water supply and potential contaminants, typically achieved by positioning the discharge point of a fixture (like a sink or dishwasher) above the flood level of the receiving vessel. This design is crucial for maintaining water safety and is often required by plumbing codes in various applications.