covered tanks
High-volume above-ground liquid storage with a practical floating cover for protection, efficiency and long-term performance.
Downlands Covered Tanks provide large-scale above-ground storage for irrigation water, agricultural liquids and effluent-management applications. Their floating roof cover moves with the liquid level, helping minimise evaporation, reduce algae growth and protect stored contents from external contamination.
With configurations available up to 6 million litres, these tanks offer a practical solution for projects requiring substantial storage capacity, efficient installation and adaptable site design. The modular flatpack construction supports transport to restricted-access, remote and international locations, while a broad range of fittings enables each system to be configured around operational requirements.
Features & Benefits
- Floating roof cover - Adjusts with the liquid level to help minimise evaporation, reduce algae growth and limit external contamination.
- Very high storage capacity - Configurations available up to 6 million litres, supporting major irrigation, agricultural liquid and effluent-storage requirements.
- Large-scale above-ground design - Tanks can be built up to approximately 3m high and 48.9m in diameter, providing significant volume without below-ground storage works.
- Modular Flatpack Construction - Simplifies transport and containerisation, supporting delivery to remote, restricted-access and export-led project locations.
- Efficient installation - Modular assembly supports installation within approximately 1–7 days, subject to site preparation and project requirements.
- Reduced groundwork requirement - In suitable conditions, the tank system can avoid extensive concrete foundations, helping reduce installation time, cost and construction impact.
- Suitable for challenging sites - Above-ground storage provides a practical option for sites affected by high water tables, soft soils, floodplain conditions or restricted access, subject to technical assessment.
- Ground-movement resilience - The modular design is engineered to accommodate ground movement and has demonstrated earthquake performance, supporting reliable storage in demanding environments.
- Non-corrosive and low maintenance - Materials are designed not to rust or rot and can be suitable for exposed or high-salt environments, with minimal ongoing maintenance requirements.
- Flexible and relocatable - Multiple configurations are available, and the tank structure may be relocated where operational or temporary storage requirements change.
- Configurable connections and fittings - Options include base drains, additional inlets and outlets, level indicators, wash-down systems, ground anchors, tanker connections, access hatches, anti-vortex plates, valves and stainless-steel fittings.
- Long-term infrastructure value - A stated 25-year design life supports long-term planning for high-volume storage and environmental-management requirements.
Suitable applications
- Agricultural irrigation storage
- Dairy effluent storage
- Green-water management
- Large-volume liquid containment
- Floodplain and high-water-table sites
- Remote and export-led infrastructure projects
Compliance-Led Applications (need to be verified?)
