What does anti-siphon valve mean?

An anti-siphon valve is a device designed to prevent backflow of water in Plumbing systems, thereby avoiding contamination of the potable water supply. It allows water to flow in one direction while preventing siphoning action that could draw contaminated water back into clean water lines. This is particularly important in irrigation systems and fixtures like outdoor faucets, where cross-contamination is a risk. By maintaining proper pressure and ensuring unidirectional flow, anti-siphon valves help protect public health and water quality.