Dial a Digger now offers septic tanks for sale. Please visit us or call for more information.Is your soakaway, cesspit or septic tank SMELLY?
We can provide a clean, odourless solution with our environmentally friendly sewage treatment units: Easy to install, LOW running costs,
ZERO odour.

How the Diamond works

The aeration chamber (1) is a circular tank with a sloped open base, which empties into the bottom of the outer clarifier chamber (2).
Located in the centre of the aeration chamber is a 200mm diameter draft tube (3) which extends to 100mm from the bottom of the clarifier.
Air is released at the bottom of the draft tube through a diffuser (4).As the diffused air rises in the draft tube, it causes an upward flow of liquid. This draws the settled solids (5) from the bottom of the clarifier up through the draft tube where they are discharged at the surface of the aeration chamber.
The design of the draft tube ensures continuous and complete mixing of oxygen with the sewage. This allows for the growth of various organisms that biologically degrade the sewage.
Gravity causes the solids to settle at the bottom of the tank where they are again drawn back up through the draft tube.
As sewage enters the aeration chamber, it displaces biological solids from the aeration compartment to the clarifier. The digested solids settle to its base where they are returned back to the aeration compartment.
The clarified (treated) effluent flows slowly up through the clarifier and over a weir (6), which extends around the periphery of the tank.
The clarified effluent collects in an outer trough where it is discharged though a 110mm pipe connection. The scum baffle (7) located inside the overflow weir prevents floating solids (8) from passing over the weir.
Discreet lid
The small lid means that the unit can be installed discreetly in the border, ensuring easy access.
Mechanical plant backfill
Because of the built in strength of the Diamond a concrete backfill is not required, except in special circumstances. Either the excavated material, or a granular replacement such as pea gravel may be used to backfill around the Diamond.