If you fly into the flight levels then you’ll eventually need to refill your oxygen supply. Refilling the Cirrus SR22 built-in oxygen system is an easy task.
Where’s the Precise Flight Cirrus SR22 refill station located?

The refill port is located in the luggage compartment. You can find it at the lower part of the back wall just above the floor in the center of the luggage compartment. A an access door and carpet flap covers the filler station to protect it from baggage being moved around.
The oxygen remote filler station includes a manual pressure gage for use during refill and for preflight check.
It typically takes a little less than a half-hour to refill the Precise Flight oxygen system on the Cirrus SR22.
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