Modline Rainwater Tank Dimensions: 800mm x 2100mm x 1560mm (ML-0800-2100-1560). Kingspan's 2500 Litre Modline AQUAPLATE Steel Water Tank with modern flat ends can store water for outdoor use, pool top-ups and use in toilets and laundry. 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.