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Cesspool

Excavation for the installation of a Cesspool

Cesspools are used where the discharge of effluent, however well treated, cannot be safely discharged to the ground or watercourse, or where the possibility of a pollution incident is such that the material must be contained and removed from site.


Cesspools do not have overflows, and must be emptied before becoming full to avoid spillage. The smallest cesspool available (suitable for a domestic three bed roomed house) is 18,000 litres. A standard 18,000 litre cesspool measures 4.85 metres by 2.75 metres, with a distance of 2.65 metres from the invert level to base. Farm slurry and silage should always be contained in this type of container.

Cesspool diagrams

In the past, many Cesspools were installed as the most convenient option. However, the high cost of de-sludging means that they are not the most economic method of waste disposal. Some cesspools can now be successfully converted into treatment plants. For more information contact S&B Services.