The Human Right to Water and Sanitation is recognized world-wide since 2010. We developed a small plant, which allows it to improve water quality through heat treatment. The plant uses solar energy, comparable to a flat plate collector. In this way it works as a standalone system that is widely independent from other infrastructure. The development of the concept aimed at a user friendly handling, which helps preventing any accidental misuse. We tried to live the idea of “helping people to help themselves” and reduced the design’s complexity as far as possible while increasing its robustness. This enables people to rebuild our design with the help of a construction manual which we created.