Hi I need to replace the propane line that runs from the tank to the utilities. Has anyone used oanything other then copper? The hardware store guy says I can use the copper flex pipes used on gas dryers,etc. advice appreciated. jim
Most modern trailers use black iron (not galvanized) from the front of the trailer and tee off mid trailer with copper. The older copper was much tougher than new, so if you can save any of the original, that would be good. All of mine have been copper from the regulator on back.
At the front, a rubber low pressure propane line goes from the black iron to the regulator, usually 3/8 flare to 3/8 flare. (regulator will need 3/8 pipe to 3/8 flare fitting)
Flex lines are not legal on RVs; they are not meant to take a lot of movement/vibration. I talked to a tech not too long ago, and he did mention something "rubber" under brand new trailers. I'm not sure what it was-and since copper is so easy to work with, I use it on my vintage trailers.
Post by offspringin on Jan 10, 2012 14:03:31 GMT -5
mine is copper in the walls (original) but once it gets under the trailer its a rubber gas line. these lines come in pre-cut sizes and cannot be cut down at the house (from what i am told because of the fittings).
Anyway, there is a rubber line that runs to the regulator, then another comes out of the regulator and runs to the tank.
Those hoses and regulator were replaced within the last year.
and i agree with not using flex lines on a trailer/RV. In fact im pretty sure they are no longer allowed to be used even on the inside furnace units on a house. The vibration of the unit can cause holes to wear through as it rubs on the unit itself. Eventually you have gas leaking next to a flame source. (im not positive on this, my Dad owns an AC business but i have to admit i dont recall what he told me word for word on the flex line, i could be totally off..... just what i remember)