After pretty exhaustive research on home heating options and hearth options, I finally settled on a Jotul 200 Lillehammer DV which was installed here in November (2009). The problem that prompts this post is that the installer used some rusty black iron pipe for the stove gasline. About 60 feet of pipeline was run from the gas meter to the stove. Of that 60 feet of pipe, about 26 feet runs in the crawl space under this one level ranch style home with attached single car garage. Of that 26 feet, a 20 foot section of pipe has the most rust on its exterior and is in unacceptable condition to this homeowner. Rust has also quickly developed on the pipe exterior right next to the gas meter (located outside next to an exterior garage wall) because it is exposed to the rain. I'm told by private sector building inspectors that stainless steel flexpipe is actually the preferred material to use: its said to be easier to install and does not rust. What pipe material is commonly used in installations? Its also said that a sediment trap should be installed immediately behind the stove and downstream from the shutoff valve, and that without the sediment trap, debris could get into the stove and cause problems. Is this correct and are sediment traps commonly installed?