Well after filling my onboard propane tank, its empty the next morning with nothing running. so started checking it out and soap testing all connections. test all the connections I could access from the outside of the coach. nothing found. so under the MH I went locating the routes used for the propane. I found a long hose running from the tank to a manifold behind the driver rear tires. I could hear a small leak sound. Well guess what???? the feed hose is clamped to the frame in a few places EXCEPT over the rear axle!! it had come in contact with the rear U bolts for the leaf springs ,wearing a small hole in it. this is with less than 3000 miles on the rig. All other owners please check your MHs !!! This could have been very dangers if I stored my camper in a closed storage.