The fire hydrant on the northwest corner of Damen and Fulton is “jumpy.” Meaning, in Department of Water Management parlance, that water can be heard vibrating within the cylinder, a tip-off that the neoprene seal inside has decayed and is leaking.
A leaking fire hydrant wastes water, and in winter will freeze, rendering it useless — common enough that on really cold days the Chicago Fire Department routinely sends four engines to a really big fire, setting up north, south, east and west of the scene to make sure they tap enough working hydrants.
