At the end of Jan. I posted about my LP Water heater sooting up. Here is an update. I checked it every day and on Thursday (2 days ago) it was doing it again. Not wanting to fail to wake up some morning, I shut it off, pulled it out and replaced it with an electric. (Ya, I know all the pros and cons etc., but I didn't feel like playing guinea pig) The interesting part was when I removed the piping (LP gas) I got about a quarter of a cupful of junk out of the pipe that looked like iron filings. (copper pipe) I tested it with a magnet and it was not iron. I have no idea what it is or where it came from, but I feel quite sure that it was affecting the orifice. Any thoughts?