Profile: Premier Conduit Inc. is a manufacturer of corrugated conduit for telecommunications and other markets. Our products include corrugated HDPE, plenum and riser duct. Riser duct is a flexible, non-metallic, corrugated raceway used for effective interior cable and fiber optic management. Corrugated HDPE is manufactured from high density polyethylene (HDPE) and is intended to be placed inside of existing innerduct. It is ideal for pulls under 1000 ft. and is designed to reduce surface contact when pulling cable. This lightweight product offers maximum flexibility, and allows for installation in small or restricted areas.