The GRAF Ecobloc Maxx stormwater infiltration and retention/detention modules have three times the storage volume of a standard drainage gravel. One module therefore takes the place of around 1300 kg (1.4 tons) of gravel or a 50 m (164') of 100 mm (4") drainage pipe. This eliminates a very significant amount of excavation and soil and gravel handling - providing far greater value and savings than use of traditional methods and materials - the GRAF modules save you and your clients hard-earned cash!
The GRAF EcoBloc system is designed for a service life of over 50 years. The modules are very efficiently German designed for maxiumum structural capacity for material used, maximum space efficiency for shipping and storage on site, and speed and ease of installation - matched by no other system. A wide variety of configurations and burial depths are possible with EcoBloc - moreso than with other stormwater systems. The EcoBloc Modules Maxx and Inspect Flex still offer a reservoir coefficient of 97% & 96% respectively despite their high load-bearing capacity. This means that up to 14 layers of EcoBloc modules high are possible - 5 m (16.4').
Please consult BARR Plastics when the installation depth required is greater than 5 metres.