ADS 3000 Triple Wall HDPE (High Density Polyethylene) pipe is triple bonded for exceptional pipe stiffness. With smooth inner and outer walls and a corrugated structural core, ADS 3000 Triple Wall HDPE pipe is designed to have superior pipe stiffness to that of PVC sewer and drain pipe, yet priced to compete. A smooth inner wall is coextruded with a corrugated structural core which is then extrusion laminated with a smooth white outer wall. This construction gives the pipe an unprecedented strength-to-weight ratio and stiffness ratings at least double that of any competitive sewer and drain pipe. Will not crack or flatten under typical loads and has excellent resistance to impact damage, abrasion, and corrosion and is light weight. Consistent dimensions and tolerances. Deep tapered bell ensures tight fit. Pipe will fit any standard sewer and drain fitting such as PVC, Styrene, and others. Applications include: Downspout runoff, sump pump outlet, foundation/footer drainage, curtain drains, septic leach fields, retaining walls, agricultural drain outlets, irrigation, and parks and golf courses. Perforated pipe has 2 rows of 5/8 In. dia (diameter) hole and 120 deg (degree) spacing.