Below is a list of Copper Tubes manufacturers from Downers Grove, Illinois. Copper tubes are hollow metal piping systems that are used to convey both liquid and gases. They are always made of copper that is at the minimum 99.9% pure, meaning no alloys are used. Tubes made of copper provide excellent thermal and electrical conductivity, as well as corrosion resistance, strength, ductility and a wide temperature resistance. These properties, in addition to their superior formability and light weight, make copper tubes the most popular choice for plumbing, heating and cooling systems in residential, commercial and industrial buildings.