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. Septic filter fabric is used to wrap perforated drain pipe to prevent backfill soil from leaking into the pipe. Keeps pipe clear of dirt and debris that can clog it and cause back-ups. Non-woven, man-made fiber is strong, durable, and long-lasting. Color: Black.