The Flood Stop Leak Detector device is an automatic shut-off valve that is auto-actuated by the slightest sign of moisture that comes in contact with the sensor pad. One droplet of moisture will automatically shut off the water flow if there is an active leak present. This limits the flow of the leak to a manageable rate, allowing the tank heaters to “gulp out” any remaining water inside until help arrives. It also allows the drain pan to collect the remaining water and drain it outside as designed. A Flood Stop can save you thousands in repairs bills and insurance headaches and is STRONGLY RECOMMENDED for all attic water heater installations. Some homeowners insurance providers even apply discounts for leak detection devices.