Water economy lavatory flush box - is partitioned for selective third, two thirds or whole volume emptying

The valve (1) of a float (2) is released when the float falls, and water runs into a lavatory flushing cistern. Partitioning the cistern by one-third enables 3 litres, 6 litres or the entire content of 9 litres of water to be used according to needs. Two bells are fitted, with appropriate activating mechanism. A connection (5) runs through the partitioning wall (6) in the cistern, to enable the small cistern to be filled from the valve (1) in the big cistern. More than 50% of normally used water can be saved by selective flushing operation.