Public Works Department is working on fire hydrant flushing to clean supply lines and to inspect and operate system components. City staff also will be testing each fire hydrant pressure rating. Crews also operate main isolation valves using a mechanical valve turner to verify and support functionality. Phillipsburg's water system has approximately 90 fire hydrants and 250 valves. Approximately 100% of the fire hydrants and 20% of these valves are visited annually. Fire hydrant pressure ratings is one component used by the insurance rating company to set building insurance ratings.