DrainEezy Steel Bund is an easy to way to provide bunding, drainage and filtration for distribution transformers or other oil-filled plant in outdoor locations. Quicker and more cost-effective than building concrete bunds and compliant with safety and environmental requirements, these bunds are widely used on renewable energy, Battery Energy Storage Systems (BESS) and data centre sites.

These high-quality engineered bunds are custom-built for each application and to applicable standards (EA, BS EN, DNO-specific specifications), ensuring full regulatory compliance without compromise. Bunds are ported for use with DrainEezy Bund Filters.

Contact us to discuss your requirements.

Key Features

• Fully Bespoke Design: Every bund is engineered from the ground up to match your site layout, asset footprint and risk profile. Each design is sized to meet industry-standard containment requirements, typically providing at least 110% of the largest oil volume or 25% of the total oil volume (whichever is greater), ensuring safe retention of transformer oil in line with DNO specifications and oil storage regulations.

• Integrated Oil Containment, Drainage and Fire Mitigation: A single system designed for oil escape prevention and safe rainwater drainage without hydrocarbon discharge. By automatically removing free oil from the bund, it reduces available fuel loads, supporting overall site fire mitigation.

• Retrofit and New-Build Ready: Delivered ready to use and requiring only a concrete plinth, steel bunds are significantly quicker to install than concrete bunds.

• Compatible with DrainEezy Filtration Systems: Engineered for seamless compatibility with Green Rhino’s DrainEezy range, our pre-ported bunds provide a low-cost, and low-maintenance solution for rainwater filtration and drainage.

• High Structural Integrity, Reduced Footprint: Structural mild steel construction delivers a superior strength-to-weight ratio versus concrete, enabling thinner wall sections and a smaller overall footprint which can be critical on constrained substation and industrial sites. Its full impermeability to water and oil also ensures maximum environmental protection.

• Advanced Corrosion-Resistant Coating: Protected with a galvanised or painted coating system, providing long-term resistance to water, hydrocarbons and aggressive site environments including coastal and heavy industrial locations.

• 20+ Year Service Life: Engineered for longevity. Coating-dependent service life of over 20 years, significantly reducing whole-life cost versus alternative bunding approaches.