LP is stored in a liquid state in containers known as DOT cylinders in trailers, and ASME Tanks in motorhomes. DOT cylinders are portable like those used for residential grills and can be removed and taken to the filling station. They need to be certified after 10 years. ASME tanks are permanently mounted to the frame of a motorhome in a vented compartment.
LP System Session 2: Overview of LP Tanks and Cylinders
