Underground rainwater harvesting systems from GRAF are make ecological and economic sense. Up to 50 % of drinking water can be saved, preserving groundwater reserves and taking the strain off wastewater treatment systems. The flat Platin tank with a volume of 1,500 l or more is easy to install yourself. The large Carat XXL tank with a volume of up to 122,000 l can handle a large rainwater requirement. GRAF complete packages provide everything you need for professional rainwater harvesting. For use in the garden or home, suitable for pedestrian or vehicle loading - everything is possible!