They let the amish CB dealer talk them into using a "cobble system"...pex AL pipe with some real thick pipe insulation over it, and then the whole thing buried in 8" corrugated pipe...this would work fine if you lived in a real dry area that had excellent drainage and a low water table...but that is not how things are here locally...so basically as soon as this system gets wet, its almost worthless as far as insulation value. The new pipe (not installed yet) I think is this... INSULPEX pre-insulated PEXa piping | Mechanical & plumbing | REHAU
