The aviation fuel service system at Sunvarnabhumi Airport begins with receiving aviation fuel from two transfer pipelines which are THAPPLINE from Thapp depot and JP-One line from Bangchack. The product is then quality tested and controlled at aviation fuel depot, BAFS. The fuel farm storage contains 4 tanks with approx. 60 million litres capacity feeding a hydrant system (24” twin feeder line) operating pressures from 9.5 – 12.5 bars. Jet A-1 fuel from the depot is then channeled through 8 hydrant pumps into the hydrant pipelines network which buried underground and spreading throughout the aircraft parking area and then to each of the 119 parking pits. The final step of the Jet A-1 fuel delivery from the hydrant pit to the aircrafts requires hydrant dispensers. These vehicles are provided with metering, filtration and control valves to safely control the flow of fuel into the aircraft, also equipped with pressure controls to regulate the suitable pressure into the aircraft.