A properly managed hydrant assessment program helps to establish schedules for repair and replacement through regular hydrant maintenance through which a utility can determine the useful life of a fire hydrant and schedule replacement well in advance of predictable hydrant failure. For public health and firefighting operations, the hydrants should be tested on a regular basis to ensure that they are capable of delivering water at required pressures and flow rates. The distribution systems are constantly impacted by improvements, deterioration, changes in usage and even maintenance activities.