Rainwater harvesting can be used to supply toilets and cisterns for flushing.
A simple arrangement of 2 water feed with the ability to close off domestic supply
and use the recycled rain water is possible in most properties.
A filtration system can be installed along with a solar powered pump to feed rain water into attic storage tanks during daylight hours.
With time and thoughtful planning washing machines/ dishwashers and all machinery using mains water can be readily supplied with free water there by reducing the charges which are in the process of being finalised.
In time the water usage within a property could be reduced by up to 80% leaving only the mains water for cooking and kitchen use.