Product Details  The ecojohn jr. System comes equipped with a standard low-flush water toilet such as currently found  The ecojohn jr. System comes equipped with a standard low-flush water toilet such as currently found on boats and motor homes, a standard holding tank with pumps, a burn unit (ecojohn jr. ), a standard double-wall chimney, and a catalytic converter that cleans the outgoing air. The low-flush toilet has a macerator pump that dissolves the waste before it is transferred to the holding tank. Once the waste has reached the holding tank it can either be delivered to the burning chamber based on level in the tank, or it can be held until a special time when it is more convenient to burn the waste. What makes this model so unique is not only its efficiency, but also the fact that it is able to burn gray water. This means that it is possible to connect showers, sinks, and toilets etc. To the holding tank where it all gets incinerated: Expensive and unpleasant pump-outs is eliminated. Because of the extremely high temperature in the burn chamber ecojohn jr. System leaves no residues!