Dual Flush Toilets: More Than Just Two Buttons

Modern toilets often come with two flush options: one larger, one smaller. These are called dual flush toilets, but have you ever wondered why they exist? Let’s break it down.

The Concept of Dual Flush

Dual flush toilets feature two separate buttons or levers, each linked to its own exit valve. The smaller button uses less water, while the larger one releases more. This design allows users to choose the flush that matches their needs.

Save Water With Every Flush

The larger button releases around 6 to 9 liters of water for solid waste. The smaller button releases only 3 to 4.5 liters for liquid waste. By using the smaller flush when possible, you conserve water and reduce unnecessary waste.

How Much Can You Save?

Switching to dual flushing can save a household up to 20,000 liters of water per year compared to single-flush toilets. While installation costs slightly more, it’s eco-friendly and helps lower water bills.

A Brief History

The dual flush concept was proposed by American industrial designer Victor Papanek in his 1976 book Design for the Real World. Australia first implemented it in 1980, and it has since spread worldwide.

Get Smart: Flush Wisely

Next time you use the toilet, choose the flush that fits your need. For liquid waste, press the smaller lever—look for a half circle, small raindrop, or other visual cue. For solid waste, use the larger lever, typically bigger or marked with a full circle.

By flushing smart, you save water, help the environment, and lower your bills—all with a simple choice.