Septic Tank

A method of sewage disposal that normally comprises two or three linked chambers within which self purifying (bacterial) process takes place. Beyond the chambers is an outfall to land drains or soakaways for the purified liquid effluent.

Dependent upon soil conditions and method of use, septic tanks can remain undisturbed for a number of years, although occasional emptying may be needed. New land drainage or soakaways may also be required, but on average probably at intervals of not less than 10 years.