A septic system takes raw effluent from a home and distributes it over a drain-field so that it can be cleansed by the natural processes in the soil. We will briefly explain 6 different types of septic systems.

1. Gravity; Gravity systems use gravity to move the effluent through the tank into the drain-field. These work best where there is a good depth of soil.
2. Pressure; Pressure distribution systems make better use of the whole drain-field by ensuring an even distribution.
3. Mound; Mound systems have the drain-field built above ground level to ensure there is a sufficient depth of soil for effective filtration.
4. Sand Filter; Sand filter systems use a bed of sand to filter the effluent and a pump to disburse the effluent more effectively. These systems are for use where there is not enough depth of soil for effective treatment of the effluent.
5. Aerobic; Aerobic treatment units use oxygen to break the effluent down, to produce a cleaner waste. These systems are used in areas where there are environmental issues to contend with.
6. Closed; Closed septic tanks are systems that deliver the effluent into a septic tank that has to be emptied at regular intervals for the effluent to be treated elsewhere.