RainBank is an automatic controller for rainwater harvesting. RainBank is produced by Davey Products, an Australian designer and manufacturer of water transfer pumps and pressure systems for the rural, domestic, industrial, pool and spa markets.How it works:

1. When a toilet is flushed or a washing-machine begins to fill the RainBank system detects this demand and automatically checks to see if there is sufficient water in the rainwater storage tank.
2. If there is sufficient rainwater then RainBank switches the supply to this source and completes the demand cycle. Once the demand cycle is complete RainBank automatically switches off.
3. If the rainwater supply is depleted at any time during a demand cycle or prior to a demand cycle, RainBank provides mains water to fulfil the demand. In the case of a power failure, RainBank automatically supplies mains water as the backup.