In a bathroom, shower and sink, use 500 liters per person per day approx, composed mainly of water and biodegradable products (soap, detergents and disinfectants), which can be treated in a small plant for reuse in toilets, water for irrigation and fountains. 

A toilet implies a consumption of 50 liters per person per day approx. of water. 

To recycle this treated water will require the installation of a second piping network for collection, treatment and recycling, in addition to fresh water system.