We are selling our home that was built 12 years ago and uses propane from an in-ground storage tank. A looker asked if the gas plumbing in the house was rated properly for natural gas if they wanted to convert (mains were brought in to the neighborhood a few years ago, not many conversions undertaken but all new construction seem to have decided to use NG). I didn't realize there would be a difference in the iron pipe used to distribute gas in the house. One neighbor who converted said all they had to do was appliance conversions, but none of the gas plumbing had to be changed. I believe that propane is coming in at a higher pressure anyway than natural gas would, so my lay impression is that it would handle the lower pressure just fine. I'll have to go check again, but in my mind's eye I think we have 1" pipe throughout. So, pros, is a house plumbed with a different grade of pipe depending on the gas to be transported? If so, is there a difference in a propane to NG conversion versus a NG to propane change? Finally, again I'll have to climb up there and measure and get BTU ratings, but we have one furnace and one water heater that are probably about 180 ft from the regulator. With a 1" pipe would there be adequate delivery of NG at the far end? Have had no problems with the propane getting there. Thanks for words of wisdom. We don't intend to convert, but would like to be able to discuss intelligently with potential buyers that get to this level of detail.

A few days ago our pedestal sink started leaking, so today I started looking around and noticed that the pipe going to the p-trap is leaking. While moving the pedestal, the minor shocks completely broke the pipes going to p-trap and going to the wall. so I went to Home depot and bought new sink popup drain (pvc, expandable with chrome top, 1-1/4") and new pvc p-trap (1-1/2" because I thought the old chrome one was 1-1/2") Then I noticed that the metal pipe coming from the wall has no threads. I am guessing that the pipe corroded and the threaded part broke down. (Is that galvanized steel?) Here are couple of photos. The ID of the pipe is 1-1/2" and OD is 1-3/4") [IMG]http://i794.photobucket.com/albums/yy225/tnkrer/plumbing/IMG_0255.jpg[/IMG] [IMG]http://i794.photobucket.com/albums/yy225/tnkrer/plumbing/IMG_0254.jpg[/IMG] So question is how do I connect all this together? After some reading around forums, I came up with this idea .. Use [URL="http://www.amazon.com/Fernco-P1056-150-Flexible-Reducer-Coupling/dp/B000BQ7TAM"]fernco reducer rubber coupling[/URL] and connect a 1-1/4 threaded on one side pipe to this wall pipe, buy another 1-1/4 p-trap and connect that p-trap to the pvc popup drain on inlet side and this metal threaded pipe on the outlet side. Does that seem right? Is there a better way? Thanks