The AUSDRAIN™ EnviroSump has been designed to filter stormwater from roofs and pavement areas and to discharge clean water to the AUSDRAIN™ tank. This has resulted in a low cost, effective and easy to maintain stormwater filtration unit.

Each unit consists of a 600x600x700mm polyethylene pit containing a removable stainless steel basket with handles and a 200 or 400 micron filter bag depending on flow and filtration requirements. In most cases a 400 micron bag is supplied to meet a range of rainfall intensities. A 600x600x300mm riser is also available allowing the flexibility to achieve required invert levels.

The filter bag is easily removed for cleaning, the contents discarded as compost in the garden and the bag washed under a tap. There is no costly maintenance expense involved.

Each pit is supplied with a plastic lid, however, if required a light duty galvanised grate can also be supplied to allow surface water to drain to the pit. The EnviroSump should not be installed in a driveway and is not trafficable unless the driveway slab is designed to relieve any loadings from the pit. This can be done by setting a medium or heavy duty grate in concrete surround into the driveway above the pit.

The AUSDRAIN™ EnviroSump is suitable for residential applications and small commercial projects. It is important to note that the EnviroSump is limited to the filtration of sediment and organic matter and cannot be used to filter other pollutants such as grease, oil and nutrients. In high rainfall areas and depending on the surface area of run-off it may be necessary to install more than one EnviroSump to cope with the actual potential rate of discharge.