Raw Materials
Endot receives 90% of the raw materials used in production by railcar. These resins are stored in specially constructed silos to protect against contamination. A network of piping delivers the material to the extruders for conversion into pipe, tubing, and innerduct products.

Extrusion Process
Polyethylene water pipe and smoothwall innerduct are produced on extruders capable of making several different sized products ranging from 1/2" through 4" diameter. Such versatility allows production to meet changing customer requirements. Water baths are then used to cool the pipe, ensuring correct diameter and wall thickness of the finished product.

Corrugated duct and innerduct is extruded and then put through a series of rotating mold blocks located at the end of the extrusion line. These blocks create anular corrugations which add significant strength to the tube while achieving lighter weight and improved flexibility. The design results in a conduit for fiber optic cable that is much lower in friction than the available alternatives.