When the hydrant is open and the meter valve is closed, the hydrant base is constantly filled with water. In freezing weather, this could damage the hydrant and the meter. It is the responsibility of the contractor to close the hydrant and open the gate valve to drain the water from the meter when it is not in use. A hydrant wrench is the only acceptable tool to operate a hydrant.
When the hydrant needs to be shut off, do it slowly. Closing a hydrant too fast may cause a water hammer. When opening the hydrant, it must be opened all the way. Using a hydrant in a half-opened position will cause damage to the hydrant weeps and may cause flooding around the hydrant.