
High-volume liquid storage solutions equipped with a practical floating roof cover are essential for protection, efficiency, and long-term performance.
Downlands Covered Tanks specialize in agricultural irrigation storage, providing large-scale above-ground storage for irrigation water, agricultural liquids, and effluent-management applications. Their innovative floating roof tanks adjust with the liquid level, effectively minimizing evaporation, reducing algae growth, and shielding stored contents from external contamination.
With configurations available up to 6 million litres, these high-volume liquid storage tanks present a practical solution for projects that demand substantial capacity, efficient installation, and adaptable site design. The modular flatpack construction facilitates transport to restricted-access, remote, and international locations, while a wide range of fittings allows each system to be tailored to meet specific operational requirements.

Floating roof tanks adjust with the liquid level to help minimize evaporation, reduce algae growth, and limit external contamination. These tanks are ideal for agricultural irrigation storage, providing very high storage capacity with configurations available up to 6 million liters, supporting major agricultural liquid and effluent-storage requirements. The large-scale above-ground design allows tanks to be built up to approximately 3 meters high and 48.9 meters in diameter, offering significant high-volume liquid storage without the need for below-ground works. Modular flatpack construction simplifies transport and containerization, facilitating delivery to remote, restricted-access, and export-led project locations. Efficient installation is supported by modular assembly, enabling setups to occur within approximately 1–7 days, depending on site preparation and project specifications. The reduced groundwork requirement means that, in suitable conditions, the tank system can avoid extensive concrete foundations, helping decrease installation time, cost, and construction impact. Above-ground storage is suitable for challenging sites affected by high water tables, soft soils, floodplain conditions, or restricted access, contingent upon technical assessment. With ground-movement resilience, the modular design is engineered to accommodate ground movement and has demonstrated earthquake performance, ensuring reliable storage in demanding environments. Additionally, these tanks are non-corrosive and low maintenance, designed to resist rust or rot and suitable for exposed or high-salt environments, requiring minimal ongoing maintenance. The flexible and relocatable nature of the tanks offers multiple configurations, allowing the structure to be moved if operational or temporary storage needs change. Configurable connections and fittings 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. With a stated 25-year design life, these systems offer long-term infrastructure value for high-volume storage and environmental-management requirements.
Agricultural irrigation storage solutions, including floating roof tanks, are essential for managing dairy effluent storage and optimizing green-water management. These systems cater to high-volume liquid storage needs, particularly in floodplain and high-water-table sites, as well as for remote and export-led infrastructure projects. Compliance-led applications in this domain need to be verified for effectiveness.

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