* Water efficiency

In order to save water, it is implemented a treatment system water which it allow

s to reuse greywater and rainwater. Also, some special devices are installed to save water.1. Greywater and rainwater system

Additionally to the normal cistern, it was build another cistern with similar features ( 2 x 2 x 2 m) to collect both greywater and rainwater. A separate plumbing system is installed to collect greywater which is the waste water from baths, showers, wash-hand basins and washing machine. Equally, a pipe system was built on the terraces to carry out the rainwater to the same cistern.

In this cistern, a submersible pump XIAMEN QUANTUM of 4" and 1 HP perm

its to pump this collected water to another plumbing system to flush toilets and water the garden. When there is no sufficient water in this cistern, the normal system of water is used to flush toilets.To filter the water that is input to this cistern, a homemade particle filter was built. This filter collects small particles, and cleans the water. This filter needs maintenance every two months.

Additionally a French drain system was built to process the excess of water and drainage of the cistern. This system needs also a small pump of 1/2 HP.

2. Special devices

Other special devices that are used for water efficiency are:

a) In the six bathrooms, dual flush toilets are installed, which process solid and liquid waste separately, giving the user a choice of flushes.

b) In five bathrooms and the kitchen, faucets with taps aereators onto the faucet head are installed, creating a non-splashing stream and often delivering a mixture of water and air.

c) In the social bathroom, a motion sensor faucet is installed, that is a faucet equipped with a motion sensor that opens its valve to allow water to flow in response to the presence of a hand in close proximity, and closes its valve after a few seconds.