The lightweight and easy-to-install EZflow gravel-less drainage systems save time and money while eliminating the problems inherent with gravel drainage systems. These flexible pipe systems composed of polystyrene aggregate enclosed in a woven geotextile mesh are ideal for trench, curtain, landscape, foundation, retaining wall and interceptor drains. The bundles come pre-assembled in 10-ft sections weighing only 8 lb and are available in 7-, 10- and 15-in. diameters.