Van Walraven offers the modular, cast iron, flat roof drainage system of ACO. This system offers a solution for the efficient drainage of rainwater that falls on roofs, patio areas or parking decks. It consists of drains with a nominal diameter of DN70, DN100, DN125 and DN150. You can choose between a 1-piece and a 2-piece model. The range of products offers solutions for flat roof- vegetated roof and parking decks constructions.