Dual flush toilets use around 5 litres of water per flush, single flush toilets on the other hand, use on average 11 litres of water.
If you are building or renovating, check out the fabulous new sustainable toilet designs with attached basins. These toilet suites use fresh water for hand washing before flowing into the cistern to complete the flush.
The Australian Government Water Efficiency Labelling and Standards (WELS) scheme allows you to understand and compare which products are the most water-efficient. The scheme requires products to be labelled with the National Water Efficiency Labelling and Standards Act 2005.>