The Woodford 17C-12-MH is a Model 17 Series freezeless wall faucet will not rupture when hose is removed and valve is shut off and features an anti-siphon for backflow prevention with a 1/2″ female copper or 3/4″ type m copper inlet and has a powder coated cast aluminum handle and includes an intergal backflow prevention device and uses an atmospheric vent and patented check to provide anti-siphon protection.