What is the minimum PSI required for an oxygen bottle to be compliant during preflight?

The minimum PSI required for an oxygen bottle to be compliant during preflight checks is 1200 PSI. This standard ensures that there is an adequate supply of oxygen available in case of an emergency, such as a cabin altitude loss where supplemental oxygen may be necessary for passengers and crew. Maintaining this minimum pressure is crucial for the safety protocols of flight operations, as it guarantees that the oxygen can be delivered efficiently and effectively when needed. Ensuring the oxygen bottle is at or above this pressure level is part of the preflight safety checks that flight attendants must perform to confirm that all emergency equipment is ready and functional for any potential in-flight emergencies.