Advanced Drainage Systems is the world’s largest producer of corrugated HDPE pipe and related drainage products. ADS serves the storm and waste water industry through a global network of 56 domestic and international manufacturing plants and 27 distribution centers. In addition to its flagship N-12 pipe, the company offers a complete line of fittings and other accessories including, Nyloplast drainage structures, and various geotextiles. The 6 in. Polyethylene Corrugated-to-Clay Pipe Adapter snaps to the outside wall of a corrugated polyethylene pipe with a 6 in. Dia. The adapter snaps as well to the pipe's inside diameter. Color: Black.