Even though flow reduction is virtually nonexistent. There is still a restriction at the bead location. Among other reasons this can be a problem when pigging for blockage and biofilm or when HDPE is used as a casing for telecommunication conduits.

Rhino USA of Oregon is a pioneer in the innovative introduction of rotationally molded high-density polyethylene (HDPE) manholes for sewer, wastewater, landfill leachate and rainwater collection systems, and below grade utility inspection chambers, as well as other subsurface applications. With the ever-increasing use and specification of polyethylene pipe, Rhino USA of Oregon manholes provide a compatible and easily-adaptable alternative to traditional concrete.

Pipestar offers a range of seamless, HDPE ARC™ Bends produced through a unique patented manufacturing process. The name ARC™ comes from the word ARChetype which means “original pattern or model of which all things of the same type are representations or copies”. ARC™ sweep bends are hot forged from polyethylene PE 3408 pressure pipes and are available in IPS and DIOD sizes 2″ through to 14″.