Patent ID: 8020579

Claim:
A fire hydrant security system comprising an inner cap having means for attaching an outlet port of a fire hydrant in a fixed potion and includes a member capable of extending from the periphery of the inner cap into a slot in the inner part of an outer cap and having means for retracting and retaining the position of the member in the inner cap, wherein said outer cap includes means for attaching the outer cap to the inner cap so that the outer cap can spin freely with respect to the inner cap, and a key wrench having means for fitting the key wrench over the outer cap and for aligning the outer cap and key wrench in a fixed position wherein the key wrench has a magnet located on the wall of the key wrench that becomes align with a slot on inner wall of the outer cap and wherein the rotation of the key wrench causes the magnet to align with the member and to extend the member into the slot on the inside of the outer cap thereby joining the outer cap to the inner cap.