Soak-Away System:
Solids are digested in the first compartment and then liquid flows into the second compartment and soaks away into the soak-pit.

Pump System:
Is when the divider wall that slides into the tank is removed.

Long Drop System:
Tank put on border of 4 plots to service all plots, with the option to link water later and use same applications as the three options above. 

Small Bore System:
Is the same method as the Soak-Away System.  The liquid runs off into small bore sewer network.

Click on images to enlarge.

The Advantage of a Small Bore System:

• Most of the solids are digested in the tank, which relieves the pressure on the sewer works.
• Small Bore pipe network (because only the liquids are moved).
• Large cost saving.
• Extend sewer network without increasing sewer works.

The Advantage of the Concrete Tank:

• Due to weight and design of the tank it will not float in heavy rains and high water tables.
• The tank can be placed in light traffic loads, e.g. in a drive way.
• The tank cannot be damaged by rodents, e.g. moles.
• Installation is quick.