Patent ID: 6520003
Filing Date: 2003-02-18
Classification: G01M,Y10T

Abstract:
A leakage detection device for a mains water supply system, said supply system comprising a mains water supply connected to a distribution system within a premises, wherein the device allows the selective closure of the water supply and said device includes a sensor which senses the flow of water through the supply system and at least one valve which can be controlled to close and stop the water flow to the supply system, and control means which allow the selective closure of the said valve in response to the sensor and wherein the sensor and valve are connected to the control means with the device being selectively operable in active and inactive conditions and the said valve is held in a normal, open position, when inactive and, when active, the valve remains in an open condition when no water flow is detected by the sensor, said valve moving to a closed condition when water flow is detected by the sensor at an unauthorized time, and;wherein the control means has a signaling means to alert the user to any, or any combination of, fluid flow has been detected at an unauthorized time, or at an unauthorized level and the valve has been closed; that a power supply to the device has failed or is decreasing, in which case the device goes to a failsafe closed position.