Craven Concrete produce effluent tank rings, these are 2500mm x 3500mm x 600mm, each ring has a capacity of 930 gallons (4230 Litres). The tongue and grove design allow the ring to be placed on top of each other to produce a larger tank ring.
The Tank rings can have inlet or outlet holes, up to 300mm cast within them at any point around the ring depending on the tank requirements/ Usage.
Effluent Tank Ring Drawing.