In summer, when pool conditions are warm and wind is high, 25mm (1 inch) of water can be lost in one single day - that's definitely not water efficiency.....Water that is potentially greasy from the hand dish-washing bowl, is removed separately to prevent trapped food particles entering our home-made water efficiency system, but is still used in the garden by hand.Recycled water is purified to a high degree in the soil.When this is full, a float switch detects it and the water is automatically pumped to a 1000 litre (200 gallon) tank above ground.