What is an anti syphon-valve for dishwasher?

An anti-siphon valve in a dishwasher is a safety device designed to prevent wastewater from the dishwasher from siphoning back into the clean water supply. It ensures that there is a proper air gap or barrier to maintain potable water integrity. Typically installed near the dishwasher's drain line, the valve allows wastewater to exit while blocking any potential backflow, thus protecting the home’s Plumbing system. This is crucial for compliance with plumbing codes and maintaining hygiene standards.