Model RSF 1000 and 4000 -Stormwater Filters

independently tested at a NATA-approved facility.

The RSF 4000 is made from durable and reliable materials that ensure longevity and safe operating for its expected life. Only the highest-quality, corrosive-resistant materials are used in the manufacture of all Ecosol units. For more information about materials used and their expected life.

However, the flexibility of our approach means that if the RSF 4000 is not the most appropriate solution for your project you will most likely be able to use one of our other products.

If you would like to store and use the valuable rainwater treated by the RSF 4000 then you should consider our unique fully-contained RST 7000 Rainwater Storage and Re-use system, that can be installed downstream of the RSF 4000 to provide an integrated in-line water treatment and re-use system.  The RST 7000 enables you to use the treated rainwater for watering gardens, in washing machines and equipment washdowns.

The RSF 4000 has been installed in many locations throughout Australia and overseas.

Read more below about the RSF 4000 and how it works or use the specifying form to provide us with details about your project so that we can provide you with a quote.

The RSF 4000 is a pre-cast concrete underground structure designed to filter and remove solid pollutants present in stormwater flows. The unit is designed for use in stormwater drains with the pollutants stored in a capture silo below pipe invert level.

Incoming flows enter the capture silo and pass through the filtration mesh located below invert level on both sides of the silo before entering the clean chamber and then exiting the unit. The unit also has two vertical baffles for retaining oil and grease.

The key to the success of the RSF 4000 is a design that forces a proportion of the filtered water back upstream along the by-pass channels and against the main directional flow. As this water meets the flows entering the inlet to the capture silo, a unique hydraulically-driven barrier is created ensuring all flows up to the TFR or treatable flow rate (see Glossary) are directed into the capture silo, thereby enhancing considerably its capture efficiency.

As flows of greater magnitude enter the unit, the hydraulic barrier gradually breaks down and, in major pipe discharges, allows the excess flows to by-pass, without remobilising captured pollutants. However, the unit will continue to collect and filter flows at least equivalent to the TFR during all conditions.

When the capture silo is full, the water cannot pass through the mesh and the hydraulically-driven barrier can no longer be formed. Concurrently, the pollutants form a barrier across the mouth of the filtration unit, directing the incoming water into the two overflow by-pass channels, effectively eliminating the risk of flooding.

Pollutant Removal Efficiency

The RSF 4000 has an independently-verified capture rate of greater than 98% of solids greater than 211µm, although Ecosol has found that, in practice, even better results are achieved. The composition and quantity of pollutants captured by the RSF 4000 depends heavily on the catchment size, area, land use, and rainfall patterns. However, it typically captures the following gross pollutants:

The defining advantages of the RSF 4000 are that it:

Captures more than 98% of gross pollutants greater than  211µm, 91% total suspended solids, and significant quantities of free oils and grease;

Does not re-mobilise captured pollutants;

Has large storage volume;

Has a versatile modular design that can be customised to meet precise requirements;

Eliminates the risk of flooding owing to its patented fail-safe by-pass overflow;

Has low head/hydraulic loss;

Has a modular one-piece construction (in most cases) allowing simple installation saving time and money;

Has a