Answer: The filling nozzle is a complex device whose function is defined by international technical standards. Compliance with these standards must be confirmed by quality certificates. The design of this component was focused on user comfort and protection. The filling hose nozzle is inserted into the filler neck on the vehicle and is fixed in this position by turning the … Continue reading Question 3: How can an ordinary user at a hydrogen filling station ensure that the filling hose is connected correctly to avoid the hazards associated with both the high pressure and the hydrogen itself?