Key benefits of the Graf systemPipe duct access on all four sides of the chamber.Pushfit sealed pipe connections points for 110mm diameter pipework.The chamber has a flat invert with a domed centre to assist with the flow of water through the chamber.There is no sump in the chamber which avoids the ..
Easy installationThe GRAF Infiltration Tunnels are laidin lines and can be flexibly adapted to specific conditions and to the individual storage volume requested. The installation of the modules is easy, quick and variable. The installation is possible without heavy equipment, as one Infiltration Tu..
Rain BlocStormwater Management SystemsFlexible connection options – length and crosswaysDN 100 (4")/120 (5")/150 (6")/200 (8")7.5 m maximum installation depthConnection DN 100 (4") on topPins for vertical connection already included in packaging unit3.3 Crates make up 1m3Most small roof spaces will ..