A dual water supply system for a water storage tank supplied with water from a rainwater catchment area and mains water supply

摘要

A dual water supply system for allowing a water storage tank to be supplied with water harvested from a rainwater catchment area and from a mains supply of water is disclosed. The system includes valve being coupled to a mains supply of water. The valve is responsive to the level of water within the tank to operate the valve if the level of water in the tank drops below a predetermined level and a pipe to introduce water from the mains supply through an opening in to the tank whereby an outlet from the pipe is spaced from the top of the tank and is visible externally of the tank.