Insulated Pipe
Underground, insulated piping systems are used for Hydronic heating applications including wood stoves, corn stoves, solar, geothermal and other water transfer systems.
Here is a link to some information on the what and why of Insulated Pipe.
Manufacturers of underground piping solutions (insulated pipe) that we carry include GTGlobe Industries, InsulSeal, and Maxx-R
Theses prices are very competitive. REMEMBER, you don't pay shipping when you ship to a location that has a fork-lift or a loading dock.