Get a steel one, but to get into most places to use the key you need other lock opening devices. The lowest one is best to open as water and gravity. They will bee in high rises with multi story parkade basement or and under manholes. This is a confined space know what saftey stuff you will need to enter or it can be a one way trip. Getting a realtor key and a city works key help acess are not super easy to come by. You will also need saftey hardware removal tools as many of the silcock taps are in secured cabinets to stop homeless from opening them with blunt object.
