Statistics

There are approximately 25 million toilets in Australia with over 90% being ten years or older.
Normal yearly usage figures below are based on the Green Plumbers Association 50 point audit, 2005:

Type of toilet	Normal Yearly Usage	Stop Stick conversion (estimated savings)
13 litres	85,000 litres	55,0000 litres
11 litres	72,000 litres	42,000 litres
9/4.5 dual flush	45,0000 litres	15,000 litres
11/5 dual flush	58,000 litres	28,000 litres

Based on our own 9/4.5 litre dual flush toilets of which we have three in our household, it take 80 seconds to fill our 9 litre cistern, in one hour, 495 litres will be wasted. In areas of high water pressure this figure would increase.