Efficient Toilets, Low flush toilets

An old style single flush toilet can use up to 13 litres of water in one flush. More efficient toilets save water by reducing the amount of water used in flushing. New dual-flush toilets use only six litres for a full flush and four litres with a reduced flush.

Typically up to 25% water savings can be achieved through the specification of efficient WCs. Toilet flushing accounts for about 50% of the water used in commercial offices (in homes the figure is around 30%).