Black iron is an approved pipe for all gas piping This needs a hard check before you invest a lot of time and money. Black iron USED to be okay underground in New Mexico, but is no longer approved unless it is wrapped in some sort of plastic sheathing or, I think, boxed. We just were required to dig up our several hundred yards of underground propane lines and replace them with plastic-- or the propane company would no deliver to our 500- and 250-gallon tanks because of new code.
|