Aquafuse S0400DR110P47BBXX0040 4" x 40' HDPE Pipe IPS DR11. AquaFuse Hight Density Polyethylene Piping is the perfect choice of piping materials for many applications serving oil & gas gathering, potable water, wastewater, mining & industrial systems, power & communciations, and natural gas distribution. HDPE pipe resists chemicals, corrosion, physical damage, and more to provide long-term, cost-effective piping systems.