Fire sprinklers can effectively save lives and property in the event of a fire. Unfortunately, an activated fire sprinkler, either from a damaging accident or tampering, can rapidly cause severe water damage if not stopped. Once it is safe to do so, a fire sprinkler should be stopped to limit the amount of flooding and property damage.
How to Shut Off a Fire Sprinkler Head
Make sure there is no fires actively burning.
Hold a wooden wedge in each hand.
Insert the two wedges — one from each side — into the opening between the sprinkler head opening and water deflector.
Push and tap the wedges together until the water stops flowing.