Ideal Home Show 2010 Roca W+W water-saving toilet

Roca washbasin and water closet

Combined sink and toilet

The Roca washbasin and water closet (W+W) is a new combined sink and toilet that promises to maximise space and conserve water.

On show in the Ideal Home of the Future section of the Ideal Home Show 2010, the Roca W+W uses waste water from the washbasin to fill the toilet cistern.

Roca says the ‘water-reuse’ technology used in the W+W can reduce water usage by up to 25% compared to a standard toilet.

How does the Roca W+W work?

The sink part of the Roca W+W has two exits. One exit leads to the waste pipe, which you could select if you've been using the basin to shave in or brush your teeth, and the other exit takes the waste water to be recycled for use in the toilet.

Grey water to be reused is filtered and chemically treated, before being used to fill the cistern. The W+W’s reservoir can store up to four litres of water and has an overflow, so that any excess grey water is diverted to the main waste pipe.

Roca’s W+W is on sale at selected shops in the UK, and typically costs around £2,700. To find your nearest stockist, visit the website (www.roca-showrooms.com) or call Roca on 01530 830 080.

Save water and energy

For more top tips on how to use less water in your bathroom, see our guide to using less water and reviews of water saving products.

You can also save money on energy bills by cutting your energy use - see our guides to using less electricity, cutting energy costs and reviews of energy-saving appliances.