Drip Irrigation Hose Bib Anti-Siphon Valve, Universal

Universal, hose bib anti-siphon valve, helps prevent the backflow of contaminants from the garden hose entering the home water supply, fits standard outdoor hose faucets, 3/4″ female inlet x male hose thread outlet, prevents outside water from siphoning, through an outside faucet & contaminating the drinking water.