With large ships floating on the water and heavy-duty equipment being used on land, port areas place high demands on drainage. Encumbered forklift trucks, mobile cranes and straddle carriers are as much of a challenge for drainage systems in many places as the maritime climate. In such areas, robust and hard-wearing materials, such as cast iron, are sought after. Whereas the HYDROblock heavy-duty system has retention potential owing to its large cross-section, the HYDROline system can also be used as an evaporation drainage channel.