The freshwater resource in the earth is a very small percentage of all those present in the planet. Climate change, waste and breakage of aqueducts, affect the availability of drinking water resources. Furthermore, the energy costs for pumping, transfer and purification
are extremely high. For these reasons, the cost of drinking water will increase in the next few years with double digits, and STARPAST, about it, coined the motto “save your blue
gold” proposing various system solutions. And therefore essential to provide the appropriate
systems inside buildings that save drinking water and to reuse the less valuable water (rainwater and gray) for some services that do not require drinking water with consumption savings higher than 50 %.