Polymer Developments worked closely with DPT to engineer a new generation of triple-skinned, insulated rotomoulded water tanks specifically designed for potable water applications. From the outset, the collaboration focused on combining advanced polymer science with practical field performance requirements. Extensive design modelling and iterative prototyping were undertaken to optimise the three-layer construction — integrating structural outer and inner skins with a high-performance insulated core. Detailed research and development included material selection trials, wall thickness optimisation, and rigorous compliance testing to ensure the tanks met potable water safety standards while delivering superior durability and impact resistance.

A significant component of the development process involved calculating and validating thermal U-values to ensure the tanks achieved meaningful insulation performance in real-world environments. The engineering teams modelled heat transfer behaviour across the multi-layer structure, refining density and thickness parameters to minimise thermal bridging without compromising structural integrity. This analytical approach allowed Polymer Developments and DPT to achieve strong thermal performance suitable for temperature-sensitive water storage, while still maintaining efficient rotomoulding cycle times and material usage. The result was a cost-effective, commercially viable product range that balances high insulation performance, structural robustness, and affordability for large-scale potable water storage applications.