A septic system is a delicate biological machine. It functions because of the actions of bacteria and the properties of the soil. If not maintained, this biological machine could shut down. If that happens it becomes a very unpleasant and costly setback. Therefore, it is crucial to care for your septic system by watching what goes down the drain. To prevent this from happening try reducing water use, inspecting regularly, pumping when necessary, and protecting your drain field and reserve area.