Dual Flush Technology

Did you ever think about who came up with the idea of a two-way flushing system in the bathroom, that helps to save average household up to 67% of their water consumption? Since Australia is considered the driest populated continent on earth, over 70% of land surface of which is covered with deserts or semi-deserts, it seems quite clear that designers and engineers who offered this system were Australian.

Australian people usually use housebricks as a way of saving water in a drought. The concept is the following – the brick is put into cistern which reduces amount of water in it, however this method excludes opportunity of using extra big flush if needed.

In 1980 government granted $130,000 for development of a cistern with two buttons and flush volumes (11.0 l and 5.5 l) by Bruce Thompson of Caroma. The process turned out to be troublesome because it was necessary to redesign the toilet bowl to make sure less amount of water could still remove the waste.

With the help of Thompson’s Duoset cistern it became possible to save 32,000 l of water per household during one year when it was tested in a small town in South Australia. Success of Caroma resulted in legislation to install dual volume toilets in new buildings in every state except for New South Wales.

In 1994 the company redesigned the toilet bowl in a modern «organic shape» made of stylish porcelain. Its 6 and 3 l dual flush cistern and matching bowl helped to reduce the amount of water flushed away by half.

Tough European sanitaryware market became interested in this combination of style and environmental awareness so mass exports began soon after. Today more than 30 countries worldwide are supplied with the product.