I recently purchased a 13' 1977 scamp
with a Suburban DuraTherm furnace
I saw the temperature sensing bulb on the gas valve was broken off so I knew there was going to be some gas work before I had that working.
I rebuilt the gas valve so it works in manual-mode and I hooked the furnace
directly to a gas-grill LP tank for testing in the back yard. It works GREAT!
When I reinstalled the furnace
and hooked up to the existing gas lines, I smelled gas in the camper, so I went around with my bubbles trying to find the leaking connector, but I couldn't find one leaking.
I had to have my wife turn the valve on the LP tank on a little, then off , then on a little since the high-flow leak-check function of the LP tank kept shutting off the gas.
Eventually, I found a crack on the underside of the gas line, so I replaced the whole line. When I took the line out I see THREE places where the line was burst. This was a pretty good surprise.
I'm not quite sure what caused the line to burst in three places. All were on the underside of the tube.
The previous owner had a 30# LP tank and a really old-looking regulator. The regulator had a 1 inch diameter cylindrical opening with a plastic screw disk in it (for pressure adjustment maybe) which must have been filling with water because the spring and diaphragm below the disk were completely rusted away.
Could water have gotten through the gas regulator and into the lines and frozen? That seems like it might burst the line.
Anyway, it's got all new lines now and the furnace and stove are leak-free and working wonderfully now.
Some more cleanup and we'll be ready for some northern-MN snowshoeing over the Christmas break.
High resolution photos are at: https://picasaweb.google.com/1165069...JuNr5Ou7sL9lwE