Johnny Pumps, also known as fire hydrants, are essential for fire departments as they provide water supply during fire emergencies. Other synonyms for Johnny Pumps include fire plugs, fire mains, and fire cocks. Fire plugs refer to the valve used to control the water flow while fire mains refer to the pipes that supply water to hydrants. Fire cocks, on the other hand, are the levers used to control the water pressure and flow. Johnny Pumps are constantly being upgraded and technological advancements have allowed for the creation of more efficient and advanced hydrants to aid fire departments in protecting lives and property.