Yesterday, I got a call from my father-in-law. He said that the alarm on our washing machine was going off. This is the alarm on the Washing Machine Valve Shut-Off Kit. It appears that our washing machine had leaked some water onto the floor. This device potentiallly saved us from some major damage. When the kit senses water, it cuts off water supply to the washing machine. (The reason that we bought this is becuase our old washing machine leaked and caused about $2000 of damage).