Dual flush toilets use two separate flush volumes to help conserve water each time the toilet is flushed. They feature two different buttons to perform two different kinds of flushes. The two buttons are usually labeled ‘half flush’ and ‘full flush’. The half flush button expels half as much water as the full flush, usually between 3 and 5 liters. This is enough to flush liquid waste, but not solid waste. ^{familyhandyman.com 3 1 2 4}