What type of oxygen is recommended for replenishing an aircraft oxygen system?

Aviation oxygen is specifically designed for use in aircraft and meets stringent standards that ensure its purity and suitability for high-altitude environments. It is free from contaminants that could affect performance, unlike industrial oxygen, which can have impurities. The use of aviation oxygen guarantees that pilots and passengers receive the necessary oxygen required to prevent hypoxia in situations where cabin pressure may be compromised or at higher altitudes.

Furthermore, aviation oxygen is typically stored at higher pressures and in specialized tanks that are built to withstand the demands of aviation use, including low temperatures and potential fire hazards. Medical oxygen may also be pure, but it is meant for therapeutic use and may not meet the specific aviation industry requirements for safety and effectiveness in flight situations. Thus, aviation oxygen is the ideal choice for replenishing an aircraft's oxygen system.