Patent ID: 7066197

Claim:
A water supply system for supplying water to a building including a water tank for collecting water from the roof and gutters of the building; a water level sensor means for sensing the level of water in the water tank; a tank water system for supplying water from the water tank; a water pump for pumping water from the water tank along the tank water system; a non-return valve downstream of the pump in the tank water system; a pressure sensor means for sensing water pressure of water within the tank water system, said pressure sensor means is located downstream of the non-return valve, a mains water system for supplying mains water; a three port valve having a first port connected to the tank water system downstream from the pressure sensor means, a second port connected to the mains water system and a third port connected to the building's water reticulation system; wherein when the first and third ports are open the second port is closed and when the second and third ports are open the first port is closed; and a control means for operatively receiving inputs from the water level sensor means, pressure sensor means and mains electricity supply and controlling the water pump and three port valve.