Modline Rainwater Tank Dimensions: 700mm x 1600mm x 1020mm (ML-0700-1600-1020). Kingspan's 1000 Litre Modline AQUAPLATE Steel Water Tank with modern flat ends provides water for small gardens and drinking purposes, or be used as a header tank. 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.