Toilets use a lot of water. And once they’re done with that water, well, it’s very... used. So, any time anyone can suggest a way of limiting water usage in toilets, Mother Nature wants to hear about it. Recently, Australian inventors Tom Trainor and Mark Hutton came up with a product that they claim uses up to 90% less water than a regular toilet. The EVOLUTE’s patented new technology offers a greener, drier alternative to our current “swimming pool for your doo-doo” model.

The heart of this new toilet is a rotating metal sphere, that seals off the opening to the sewer line at the bottom of the bowl. The top of this sphere has a hollow bored into it, creating a cup-shaped depression. Your waste runs into this cup, then when you flush the EVOLUTE, the metal sphere is rotated upside down, releasing the waste into the drainage pipe. One jet of water rinses out the cup before the sphere rotates back up, while another rinses the sides of the bowl. And yes, there is a small pool of water that sits in the cup when you’re using it.

Both the rotation and the water jets are powered by the hydraulic pressure of your water mains, so no electricity is required. Because sewer gases are blocked off by the sphere, and not by water, no S-bend or cistern is necessary - the EVOLUTE simply dumps (sorry) straight into the sewer line, eliminating the larger volume of water required for a conventional flush. According to its website, it uses less than one liter of water per flush, as opposed to the usual 6 to 12. It also take up 30% less floor space than a regular toilet.

The EVOLUTE is still in the development phase, and is not expected to be available to the public until 2012.

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