The Woodford Model 16 faucet includes a patented pressure relief valve (PRV) that prevents bursting during freezing conditions, even if a hose is inadvertently left connected to the faucet. The faucet will still freeze, however it will not rupture! As a result, this product prevents water damage when hose is left connected.
The Woodford Model 16 does not include an anti-siphon Vacuum Breaker.