Singhal Industries manufacturer, exporter & supplier of HDPE Duct Coupler. A PE duct coupler, also known as a polyethylene duct coupler, is a type of fitting that is used to connect two pieces of polyethylene ductwork. Polyethylene ductwork is a popular choice for underground ducting and piping applications due to its flexibility, durability, and resistance … Continue reading HDPE Duct Coupler