Triple-wall pipe can be used for many applications including, onsite septic, retention walls, downspout runoff, sump pump outlets, foundation footers, and curtain drains. Triple-wall pipe is unaffected by extended exposure to the suns heat and ultraviolet radiation, it is immune to freeze/thaw conditions while the characteristics of HDPE allows it to be corrosion resistant to acids, alkalis, and salts, and will not rust. Triple-wall PIPE is made of three bonded layers to provide exceptional pipe stiffness the smooth inner wall, corrugated structural core, smooth outer wall provide strength-to-weight ratio and stiffness rating at least double that of any competitive pipe. Spun welded bell end of ADS triple-wall has been designed for a tight fit to provide a soil tight connect, and eliminates the need for glue. ADS triple-wall will accept standard PVC or styrene sewer and drain fittings.