Hose bibbs and sillcocks are installed on the exterior of a building to allow hoses to be connected for landscaping, washdown, and facility-maintenance tasks. Yard hydrants are tapped into buried water supply lines to provide year-round access to water in outdoor areas.
The best way to prevent water from freezing in an outdoor water hydrant is to start with a quality hydrant like Woodford frost-free. Besides using a quality hydrant, proper installation and removing hose connections are the only things needed to prevent a water hydrant from freezing.