Clearwater Sigma Shallow Septic Tank 4800 LtrClearwater shallow installation septic tanks are designed for installation where conventional spherical septic tanks could not practically be installed. Typically, in areas where granite rock strata is close to the surface this tank may be used in preference to the more conventional but deeper tank.
In all other respects guidance notes for positioning Klargester spherical septic tanks would still apply. There are two chambers to access and therefore two manhole shafts with this unit.
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About Septic TanksSeptic tanks are like sewage treatment plants – just on a smaller scale.They are chambered,vary in size (typical capacities 2800-5000 litres) and are used for properties with no mains drainage connection.
Septic tanks have an inlet from the waste pipe of the property and an outlet into the drainage field or soak-away. The term “septic” refers to the process of anaerobic bacteria (does not need lots of oxygen) breaking down and mineralizing waste discharged into the tank.
When waste enters the first chamber, solids settle and a surface scum forms a 'crust'. Settled solids then get digested by the bacteria and the remaining liquid waste enters the second and third chambers where more settlement of the waste happens – are you keeping up? Finally, excess water flows out via the outlet to the drainage field for further treatment from the soil. Any remaining solid waste must be removed periodically by tanker.