Propane gas used in truck campers are also known as LPG or LP gas. The gas is nontoxic, colorless, clean burning, odorless mixture of flammable hydrocarbon gases and used for heating, cooking, and cooling in refrigerators.
Thus, to overcome the odorless features, Ethanethiol is added to LPG so leaks can be easily detected. Should there be an LPG leak, the gas being heavier than air will flow along the floor of the truck camper. For this reason, truck camper manufactures are required to install LPG detectors close to the floor.
the Lpg container
The most common LPG container used in RVs are the 20- or 30-pound cylinders. These cylinders are mounted either horizontal or vertical in the RV and are not interchanged.
Cylinders are subjected to the twelve year and five-year interval requirement for recertification.
truck camper tanks need to be re-certified
These regulations are designed for safety and your protection in determining if a cylinder is safe and legal to be fill and refilled. As a truck camper, owner, you must be aware of these interval requirements.
The date that the cylinder was manufacture is stamped on the protective collar, also called the neck ring.
Example, a cylinder manufactured in July 2005 needs to be re-certified before July 2017 and every five years thereafter. The collar is also stamped with the empty weight of the cylinder in pounds known at TW (tare weight).
TW for a vertical cylinder is about 24 pound and generally called “20 pounders” while horizontal cylinders have a TW of 27 pounds.
A “20 pounder” when filled to the legal capacity of 80% will weigh about 38 pounds.