I had a " thing" happen last weekend just before I was suppose to pull the trailer out of storage for a camping trip.
Topped 1 tank off that was pretty low and in the process noticed how the rubber lines looked sort of tight against the tank cover , but over the last 4 years never paid much attention.
Next day I go through the truck / trailer setup check list ....find a burst line and all that wonderful propane escaped to the atmosphere!
Replaced both sides with braied steel lines....ready to try it again!