Advanced Drainage Systems, Inc., is the largest manufacturer of high-density polyethylene drainage pipe. Producing pipe in 3” to 60” diameters, plus a complete line of fittings and couplings, ADS offers a total system for effective and cost-efficient drainage. Other specific products include a superior panel-shaped geocomposite drain pipe, smooth interior storm sewer pipe, on-site septic systems, catch basins, geotextiles and stormwater separation units