In the natural water cycle, not a single drop is lost. Nature's perfect system is the model for REHAU and its sustainable water management, securing this vital resource for future generations. This applies to both regions with limited water sources and other parts of the world that are richer in water, helping them to meet the increasingly strict environmental regulations and avoid financial penalties. The solutions cover the complete water cycle, from the supply of drinking water, via rainwater management, through to the disposal and treatment of waste water. Polymer high performance materials guarantee leak tightness and safety, for up to 100 years.