VV-DrainCell sub-soil drainage modules VV-DrainCell is a sub-surface drainage panel that provides the ultimate combination of strength and water flow capacity. The modular, connectable panels are frequently used in a variety of installations where fast, high-volume water flow is critical. In addition to sub-surface drainage, VV-DrainCell is frequently used in place of heavy gravel aggregates for waterproofing membrane protection, for heat and sound insulation on structures, as a drainage channel, and on subterranean walls to prevent hydrostatic pressure build up. Typical applications include green roofs, under pavers on terraces and patios, subterranean building protection, in on-structure bio-retention areas, or as drainage layers inside large planters. Made of 100% recycled polypropylene, rigid panels are available in 1-1/8” (30mm) and 3/4” (20mm) thicknesses. A flexible VV-DrainCell panel in 1-1/8” (30mm) thickness is available for use with curved surfaces. VV-DrainCell is highly inert, and won’t break down or crush over the life of a project.