... is a lightweight, high strength modular drainage cell designed Drain CellDrain Cell is made of high impact polystyrene, high ... geotextile, Drainage, waterproof, breathe freely, protect wet.The advantage of Drain cell1. High compressive strength ,Light weight , fast Drainage , breathe ... use of porous, so that can put the water focus drain –pipe nearly .3. Geotextil covers storge board . The egdes 10 ...