Modern toilets frequently come equipped with dual flush buttons, but many people may not be aware of their purpose beyond simply flushing.

These buttons are designed to promote water conservation: the larger button typically uses about 6 to 9 liters of water for solid waste, while the smaller button uses 3 to 4.5 liters for liquid waste.

Here's why toilet flush has one large and one small button

By choosing the appropriate button, households can save up to 20,000 liters of water each year compared to traditional single-flush toilets.

Although the initial installation cost may be higher, the long-term benefits include both environmental advantages and reduced water bills. The concept was introduced by Victor Papanek in 1976 and was first implemented in Australia in 1980.