Aviation fuel semi-trailers, also known as low-profile trailers, are specialized vehicles designed for the safe and efficient refueling of aircraft on airport aprons. Their distinctive, lowered shape allows them to drive seamlessly directly under the wings of aircraft, where the fuel fill valves are typically located. The primary function of these vehicles is not only to transport and precisely dispense aviation fuel, but also to continuously filter it and remove water from the system during refueling.