High groundwater can lead to costly water damage to your building’s foundation, planters, retaining walls, and basement. The EZflow® Gravel-Free French Drain System is engineered to lower groundwater more effectively than traditional gravel systems by diverting water to a lower point. It comes as a preassembled bundle containing lightweight Poly-Rock™ made of expanded polystyrene (EPS) encased in a black geotextile mesh sleeve for easy handling and installation, eliminating the backbreaking labor of hauling and shoveling gravel to fill a trench.