Hydroex Polypropylene Drainage Cell Unit Hydroex Polypropylene Drainage Cell Unit or Grass or Gravel Porous Pavers Drainage Cell is a plastic cell structure designed for the creation of permeable grass/gravel areas subject to pedestrian and vehicular traffic, it is lightweight, easy to install and with excellent high strength interlocking system. System Benefits Very high compressive… Continue reading Hydroex Polypropylene Drainage Cell Unit