Innovative solutions for every drainage project: ACO StormBrixx® on-site detention (OSD) and infiltration tank products
ACO is proud to offer a comprehensive range of innovative OSD tank products designed to tackle the complexities of stormwater management. ACO’s water management solutions are engineered to provide reliable performance in challenging environments and conditions, safeguarding properties from water damage while supporting sustainable urban development.
Prioritising efficiency, durability and environmental responsibility, ACO StormBrixx® systems are ideal for a variety of scenarios, from smaller residential projects to large-scale industrial developments.
Explore the range of OSD tanks, and get in touch with the team today to discuss your water management needs.
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What is ACO StormBrixx®
ACO StormBrixx® is a unique and patented plastic geocellular stormwater management system. Designed for surface water infiltration tanks with high storage capacity, its versatility allows it to be used in applications across all construction environments as a standalone solution or as part of a Water Sensitive Urban Design (WSUD). With roots dating back to the 1940s, ACO is a pioneer in the water drainage and management industry. The company understands the crucial role of tactical stormwater drainage systems in protecting infrastructure and the environment. ACO’s solutions consider all stages of the stormwater cycle, from collection to controlled storage, filtration and regulated release of water.
The modular StormBrixx units, available in standard and heavy-duty options, deliver high storage capacity, exceptional stability and easy installation. These OSDs are also customisable, ensuring you receive the correct and most robust stormwater management solution.
These OSD tanks are complemented by flow control systems, orifice plates and filtration solutions that regulate water flow, filter out debris and ensure compliance with local stormwater standards.
StormBrixx® SD
Standard Duty system
Applications
- Landscaped areas, no vehicles
- Landscaped areas with ride on mowers
- Pedestrian areas
- Driveways, car parks, up to 9 tonne vehicles (solid pavement required)
- For applications with heavier loads and/or high ground water, contact ACO
StormBrixx® SD unit parameters
| No. of layers* | 1-3 layers |
| Vertical Strength | 350 kN/m² |
| Lateral Strength | 70 kN/m² |
| Design Life | 50 years |
| Typical Cover – Landscaped | 0.5m |
| Typical Cover – Car parks | 0.6m |
| Maximum Installation Depth** | 4.5m |
| *Extra layers may be suitable in specific applications, contact ACO. **Ground improvements may be required and ground water has not been taken into account. Seek engineering advice. |
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StormBrixx® HD
Heavy Duty system
Applications
- Landscaped areas, no vehicles
- Landscaped areas with ride on mowers
- Pedestrian areas
- Driveways, car parks, up to 9 tonne vehicles (solid pavement required)
- Fire trucks, delivery vehicles, semi-trailers (30 tonnes) (solid pavement required)
- For applications with semi-trailers and/or high ground water, contact ACO
StormBrixx® HD unit parameters
| No. of layers* | 1-4 layers |
| Vertical Strength | 455 kN/m² |
| Lateral Strength | 95 kN/m² |
| Design Life | 60 years |
| Typical Cover – Landscaped | 0.5m |
| Typical Cover – Car parks | 0.6m |
| Typical Cover – Truck traffic | 0.8m |
| Maximum Installation Depth** | 6.0m |
| *Extra layers may be suitable in specific applications, contact ACO. **Ground improvements may be required and ground water has not been taken into account. Seek engineering advice. |
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How ACO StormBrixx® works
Every ACO StormBrixx® stormwater detention tank manages runoff in a controlled, reliable way at each stage of the cycle, from the surface right down beneath your site.
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Step 1: Collection
The process starts above ground, where surface water is captured and guided into the system. The trench drains gather runoff from car parks, driveways and paved areas before directing it into the StormBrixx® underground detention tank.
Step 2: Filtration
Before water moves on, sediment and debris are managed. Treatment devices filter out solids and regulate flow, keeping the system clear and compliant with local standards.
Step 3: Storage
Once water enters the tank, the geocellular modules deliver high storage capacity within a compact footprint. The patented brick-bonding and cross-bonding design holds every unit firmly in place, giving the tank strength under load and lasting stability.
Step 4: Release or infiltration
From here, the tank can be designed to work in three ways. As a detention tank (it discharges water slowly at a controlled rate); a rainwater infiltration tank, (it lets water soak into the soil to reduce runoff or as a retention tank (where water can be pumped out and reused for other purposes).
Built to withstand the demands of varied environments, ACO’s OSD tank systems are easy to maintain while offering optimum storage, making them the premier choice for sustainable water management.
Structural integrity
The ACO StormBrixx® system has been tested independently to certify structural integrity and long-term life expectancy.
The patented brick-bonding and cross-bonding feature provides a strong, long-life installation and helps improve the construction speed of the tank.
Access and maintenance
ACO StormBrixx® addresses the fundamental requirement of access and maintenance for local authorities. The open cell structure permits completely free access for CCTV and jetting equipment which allows the whole system, including all the extremities, to be inspected and maintained from a few access points.
Simplified logistics
The ACO StormBrixx® simplifies delivery, site logistics and installation as a result of its stackable design. Each single injection-moulded body nestles into the other, optimising logistics and installation costs significantly, thus helping to reduce the carbon footprint of the system.
System benefits
Beyond reliable stormwater management, ACO StormBrixx® delivers a range of practical benefits that make it a smart choice from installation right through to ongoing maintenance.
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- Quick to install — Each unit nests into the next for fast assembly on-site, helping reduce installation time and labour costs. Check the video to see how it goes together.
- Brickbonded and cross-bonding connection for optimal stability — The patented brickbonding and cross-bonding lock the units together in every direction, giving the tank exceptional stability under load.
- Sediment bay and silt trap options for silt management — Optional sediment bays and silt traps capture solids before they accumulate, keeping the system running cleanly and simplifying maintenance.
- Maintenance access and 3D inspection access to tank interior — The open cell structure lets CCTV and jetting equipment reach the entire interior, so the whole tank can be inspected and cleaned from just a few access points.
- Environmentally efficient solution — By detaining, infiltrating or storing stormwater on-site, the system supports sustainable urban development and Water Sensitive Urban Design.
- Fully certified performance — Independent testing confirms the system’s structural integrity and long-term life expectancy, so you can specify it with confidence.
- Manufactured from recyclable polypropylene — Each unit is injection-moulded from recyclable polypropylene, reducing its environmental impact across the product’s life cycle.
- Suitable for all applications — From landscaped areas and pedestrian zones to car parks and heavy vehicle traffic, the StormBrixx® SD and HD systems suit a wide range of load requirements.
Introduce a new level of performance within urban development with ACO. Contact the team today to discuss how ACO can support your stormwater management objectives with cutting-edge products designed for long-term reliability and efficiency.
ACO products
Underground stormwater tanks
Once trench drains have collected water, it can be detained, infiltrated or stored for reuse with ACO StormBrixx®, a unique and patented plastic geocellular stormwater management system designed for all construction environments.
For more info, click here.
Building drainage
Customisable drainage products to be installed in wastewater applications in buildings. Manufactured in stainless steel, these products are the drainage channel for retail and food & beverage processing plants.
For more info, click here.
Utility enclosures
ACO Offers a range of stainless steel drainage products to be installed in both stormwater and bathroom applications in building to remove water from floor surfaces inside and around building that are frequently wet.
For more info, click here.
Frequently Asked Questions
Stormwater detention tanks are underground systems that hold runoff during heavy rain and release it slowly at a controlled rate. By limiting how fast water enters the drainage network, they reduce peak flows and help prevent flooding. In Australia, they’re known as on-site detention (OSD) tanks and usually sit empty between storms.
Infiltration tanks store stormwater runoff underground and allow it to soak into the surrounding soil rather than discharging it into the drainage network. This reduces runoff volume and helps recharge groundwater. Because they rely on permeable ground, a soil assessment is usually carried out before installation.
The difference is what happens to the water. Detention tanks release it slowly into the drainage network, so they sit empty between storms. Retention tanks keep water on site for reuse, evaporation or infiltration. In short, detention controls the rate of runoff, while retention reduces the volume leaving the site.
Both store stormwater temporarily but manage it differently. A detention tank releases it at a controlled rate into the drainage network or local waterways. An infiltration tank lets it soak into the soil, reducing runoff volume. The right choice usually comes down to how well your ground absorbs water.
