The Davey RainBank is an Australian made rain tank interconnection device that provides automatic mains water backup for tank-to-toilet and laundry connections.

RainBank can save up to 40% of a households mains water use, helping to conserve this precious resource and lower water bills. It is an automatic controller for rainwater harvesting supplying water for toilet and laundry applications.

The system automatically selects the water source with rainwater given the priority over mains supply. Mains water is supplied when the tank is empty or in the event of a power outage.


  • Provides rainwater as first priority and switch seamlessly to mains water if there is no rainwater, even in the event of loss of electricity.
  • Available with a wide range of dependable Davey pressure systems to meet the needs of your home plumbing including floatless options for flooded suction applications.
  • Systems to suit submersible pumps are also available as well as RainBank Pro for commercial applications.

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