Urban Asset Solutions Pty Ltd. products

Most experts agree that, wherever feasible, effective collection of gross pollutants as close as possible to the source is desirable.

Primary treatment devices not only reduce the level and concentration of gross pollutants in drainage networks and ultimately our waterways, but they also lower the risk of pipe blockage and consequently, the potential for flooding. They are also often a cost-effective alternative to larger, and more costly in-line/end-of-line systems.

It is here that our focus on solutions rather than products is evident. We always aim to provide the best solution to your problem.

Ecosol specifically developed the patented Rapid Stormwater Filtration (RSF) technology to overcome the limitations of traditional primary treatment systems such as trash racks and poorly designed litter baskets.

The at-source RSF 100 is installed into new or existing side entry pits of varying sizes and pipe dimensions, usually close to pollution-generating catchments such as shopping centres, schools and car parks. The RSF 100 has an independently-verified capture rate of greater than 95% of solids greater than 1.5mm, although Ecosol has found that, in practice, even better results are achieved (refer to the pollutant removal efficiency table below).

Capture efficiencies can be improved further with the installation of a 200µm mesh filter.  This collects 94% of solids greater in size than 200µm and 53% greater than 50µm.

The RSF 100 treats 100% of the incoming flow until the collection basket is full, then by clever use of a patented by-pass mechanism it switches into by-pass mode to prevent flooding or surface ponding, a common weakness of other at-source litter baskets.

As with all of Ecosol’s products the RSF 100 meets all environmental authority guidelines and has been independently tested at a NATA-approved facility, more detail here.

The RSF 100 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.

The ease of installation and affordability allows multiple units to be installed in problem areas and this approach can often be more cost-effective than larger in-line/end-of-line solutions that treat stormwater nearer to discharge into our waterways.

However, the flexibility of our approach means that if the RSF 100 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 100 then you should consider our unique fully-contained RST 7000 Rainwater Storage and Re-use system, that can be installed downstream of the RSF 100 to provide an integrated at-source 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. Click here for more information on this exciting new product.

The RSF 100 has been installed in more than 10,000 locations throughout Australia and overseas. To see a sample from our projects listing and read some case studies click here.

To learn how the RSF 100 works read below or use the specifying form to provide us with details about your project so that we can provide you with a quote.

Solid pollutants conveyed in flows from the upstream pipe are filtered through the basket positioned directly below the upstream pipe invert. The filtered stormwater then continues down through the unit to the downstream outlet pipe.

As the basket approaches 90% full, the by-pass flaps begin to open in response to the incoming flow. Once the basket is 100% full, the pressure of the incoming flow forces open the by-pass flaps allowing the e

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

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

A key element of stormwater management is the removal of a variety of pollutants using primary and secondary treatment systems, such as the Ecosol RSF 100, RSF 1000, RSF 4000 and Net Tech solid pollutant filters.

However, the treated stormwater is usually then discharged to either a local river system or to the open sea rather than being used to water gardens, flush toilets, or wash down equipment. It is estimated that use of rainwater run-off could reduce our dependence on mains water by potentially more than 50% and even up to 90%.

It is here that our solution-driven approach is highlighted again. Looking to provide the best integrated solution to the problem we recently developed the RST 7000 Rainwater Storage and Re-use System. The unit, which is delivered complete and fully contained, contains a secondary filter that removes sediment from incoming flows from building roofs and impervious surfaces and stores the filtered water in an underground tank until you are ready to re-use it. Primary filtration of larger solids usually takes place upstream of the RST 7000 unit.

The underground storage of treated rainwater reduces the risk of contamination from bacteria and algae growth and thus provides environmentally-friendly and safe rainwater. Indeed, the RST 7000 poses no risk to public safety and health.

The unit is designed for use on high-density residential and commercial sites where re-use of the rainwater is both viable and desirable. By reducing our dependence on mains water we can cut water-usage costs over time and quickly provide a positive return on the initial capital investment.

The RST 7000 is a fully tested and proven system that meets industry guidelines and standards.

The Ecosol RST 7000 Rainwater Storage and Re-use System is designed to filter and store, ready for re-use, rainwater run-off from building roofs and impervious surfaces.

The unit comes complete and fully-contained ready to be used to reticulate the rainwater to gardens, parks, and even for use in flushing toilets, filling washing machines, and vehicle washdowns.

The RST 7000 consists of a pre-cast concrete pit containing a secondary filter that removes fine sediment from flows. Primary filtration usually takes place upstream of the unit using one of Ecosol’s solid pollutant filters. This helps prevent the pollutants conveyed in the rainwater run-off from entering the unit.

The RST 7000 also has a controlled inlet device to reduce remobilisation of settled solids and manage flow velocities and, as with all Ecosol units, it has an overflow mechanism that enables the unit to discharge excess flows. A backflow valve prevents the rainwater from travelling back into the unit.

The unit comes with a pump that has a floating intake and controller, which can be used to reticulate the stored water to its destination at pre-determined volumes. Trafficable, solid-top sealed access covers provide easy access to the unit for cleaning and maintenance.

One of the key benefits of the RST 7000 is that it is self-cleaning and, therefore, largely maintenance free. Periodic inspections are usually all that is needed.

Together with an upstream primary filtration system the RST 7000 provides an environmentally-friendly cost-effective, and efficient rainwater re-use solution.

The unit comes in a range of sizes with all pipes and fittings included to suit the site-specifics.

The main benefit of the RST 7000 is that it comes complete an

The Ecosol Drop Trap is designed to remove and retain solid pollutants conveyed in stormwater runoff from impervious surfaces. The top entry filtration system consists of a pre-cast concrete pit containing a capture basket and overflow by-pass flaps. The unit is typically installed as a top entry system however can also be adapted to either in-line, or at the end of the stormwater line, where there is a drop between the upstream invert and downstream obvert levels of at least 450mm, and preferably more.

The Ecosol GPT (in-line end-of-line stormwater treatment solution) is a non-blocking, wet sump, tangential filtration system that has designed been specifically designed to filter pollutants conveyed in stormwater conduits by capturing and retaining all contaminants larger than 3mm up to a designed treatable flow rate (TFR). It can play and integral role in reducing pollution in urbanised catchments and help reduce the footprint of a total stormwater treatment train by providing essential pre-screening for downstream secondary and tertiary treatment systems.

The Ecosol Litter Basket captures and retains a range of gross pollutants at entry points to the drainage network. Easily installed into most types of side entry pits, also known as gully pits or catch-pits, it retains more than 97% of pollutants greater than 2000μm and in the field it has been found to collect much smaller particles, including fine sediments.

The Ecosol Net Guard provides effective primary treatment of stormwater flows thereby significantly enhancing the operational life of downstream secondary and tertiary treatment systems. The system has been designed to provide a robust and durable cost effective in-line primary treatment system that captures and retains solid pollutants conveyed in stormwater conduits.

The Ecosol Storm Pit (Class 2) is a unique compact at-source or in-line secondary stormwater filtration system designed to carry out multiple treatment processes on stormwater runoff within the one compact underground device.

Sand Filters are typically used in water-sensitive urban design (WSUD) as a component of a treatment train to remove pollution conveyed in stormwater runoff before discharge to receiving waterways or to underground storage for collection and reuse. Sand filters operate in a similar manner to Bio-retention systems, with treated stormwater percolating downwards through a filter media and then being intercepted by perforated pipes located at the base of the media for conveyance downstream. Prior to entering the filter media (typically sand), flows must be subjected to pre-treatment to remove litter, debris and coarse sediment. This is typically achieved via an ‘inlet chamber fitted with a primary treatment litter basket as part of the system.