Modline Rainwater Tank Dimensions: 850mm x 1700mm x 1560mm (ML-0850-1700-1560). Your Kingspan 2,000 Litre Modline Aquaplate (Colorbond) Steel Water Tank has modern flat ends and makes a good solution outdoor gardens, pool top-ups and washing cars. AQUAPLATE is a BlueScope steel specifically designed for use in rainwater tanks and storing drinking water. The corrugated steel tank has an inner poly layer fabricated to a galvanised steel substrate, while the outer layer consists of a COLORBOND laminate coating.