3D model of the AT showers. Cold water is brought via a pressurised water pipe. The pipe splits in two, and one of these pipes attaches to a hot water solar collector. After heating, it flows into a mixing tank where it mixes with the cold water. The amount of hot and cold water flowing into the mixing tank is automatically regulated using a PCB (required temperature can be set at the control panel) which controls 3 valves. In situations where the required temperature can not be attained with the solar hot water collector alone, a electric heater can be engaged which will increase the temperature to the temperature set on the control panel. When the 16 people are ready to shower (after having first applied ecological soap (from dried or wet plants with high saponin levels aka 'skin-washing plants'), the pump is engaged by pressing a button. A 1 minute delay is foreseen so that the person pressing in the button too has time to get into position. The used water flows downwards into a through which connects to a dirty water tank. The water can be stopped from automatically flowing into the tank using a plug (marked in yellow). This allows to collect (still relatively clean) water from the through using a bucket and pouring of this water into the footbath. See the 'Purchasing_the_models' link at appropedia's AT_CAD_Team for additional information on the model