Successful detention/retention tank installation starts with informed planning. When key steps are skipped or mismanaged, it can lead to performance issues, safety risks and regulatory setbacks. This page offers practical guidance for designers, engineers and installers seeking technical clarity from a proven industry leader. With decades of expertise and products made for Australian conditions, ACO outlines what matters — from ground prep to final assembly — so your system performs as designed from day one.

The information on this page should be considered as general advice only. ACO offers this guidance in good faith and if in doubt, engineering advice should be sought. Installation dimensions and methodologies will vary by site. Local ground conditions and council design requirements should be adhered to.

Save time on-site with ready-to-use retention/detention tank installation drawings designed by industry experts. Each file provides a clear starting point for design, tendering and construction documentation. Whether assessing feasibility or mapping out final plans, these downloads offer a fast, reliable way to align with best-practice installation methods.

For site-specific requirements, consult a qualified professional or contact ACO’s technical team for tailored support and product recommendations.

Typical installation drawings

Visual learners and on-site teams can benefit from ACO’s comprehensive video series, covering every stage of a retention or detention tank installation. From component assembly to system integration, these tutorials walk through best-practice techniques and product-specific insights to streamline the process.

Brickbonding of main bodies

Brickbonding is a technique to interlock ACO StormBrixx modules together in an overlapping manner. This method can be performed in both horizontal directions, ensuring that tanks of any size can be assembled and fully interlocked.

Cutting a main body in half

Depending on your project, you may need to cut an ACO StormBrixx module into two equal pieces.

Installing side panels

Side panel perimeters for the entire system offer a sound base for laying geotextile fabric. One side panel fits one module (two assembled half-modules).

Installing top covers

Top covers are used to close off the openings of the columns on the top-most layer of the geoceullular system. These covers prevent ground cover material from being pushed into the columns under load.

Layer connectors

When assembling multiple layers of ACO StormBrixx, the layers are aligned and secured by two layer connectors clicked together.

Pipe connection into remote access unit

Pipe connections can be placed directly into a remote access unit by cutting along the preset templates. ACO also offers a range of horizontal pipe connectors.

Installing remote access unit and extension shaft

The remote access unit and extension shafts are used to gain access to an installed ACO StormBrixx system.

Installing remote access plate and extension shaft

The remote access plate and extension shafts are used to gain access to an installed ACO StormBrixx system for inspection and/or maintenance.

SD half layer assembly using cover plate and half side panel

A half layer top cover plate and half layer side panel are available for ACO StormBrixx SD applications where a standard system height might not be applicable, such as locations with depth restrictions or high water tables.

Pipe connection into side panel

Pipe connections can be placed directly into an ACO StormBrixx side panel by cutting along the preset templates. ACO also offers a range of horizontal pipe connectors if needed.

With over 75 years of engineering heritage, ACO remains a family-owned global leader in water management solutions. Our retention and detention tank installation systems are designed and manufactured to meet local compliance, site challenges and construction standards. From initial consultation to on-site technical advice, our team is here to help you deliver robust, high-performance results. Enquire now for a free consultation and get the insight you need to move forward.

Feel free to browse our full range of modular tank components, access systems and installation accessories to find the right solution for your next project.