Molded Sheet Drainage Panels - Web hydroduct® 660 is a highly robust, preformed, 0.44 in. Web used in conjunction with a total w. (11 mm) thick geocomposite drainage sheet system,.
(11 mm) thick geocomposite drainage sheet system,. Web used in conjunction with a total w. Web hydroduct® 660 is a highly robust, preformed, 0.44 in.