WATER USED TO FLUSH TOILETS IS ONE OF THE LARGEST USES OF WATER, THE POTENTIAL SAVINGS ARE SIGNIFICANT

Daily water savings can be estimated based on typical daily toilet flushing. The amount of water used in flushing dual flush toilets each day is estimated as one full flush and four low use flushes per occupant.*1 A summary of the potential water use for different toilet types is shown in Figure 5.1.

Several different makes of toilet with different volumetric uses are on the market today.

The volume used is determined by theflushing mechanism. One example is the 4/2 litre dual flush Ifo Cera style of toilet, shown above, which uses significantly less water than other styles.

(4/2 refers to the voume of water used for each type of flush in this case 4 litres for the main flush and 2 litres for the short flush)

Another is the Ifo Cera ES4 which has a single flush of 4.5l. In practice there are a range of different technologies available which improve on the Water Regulations values of 6/3, 4/2 or single flush 4.5l.

The use of water efficient toilets should reduce water use and so offer savings to metered households. Different types of flush are shown in the table below. The list price of these toilets varies from £220 to £380.

(Click on table to show larger version)