Before each outing, check the status of the inflator and that the CO2 cylinder has not been used, has no leaks, and is screwed in tightly. Also check that the PFD itself has no leaks by removing the CO2 cylinder and inflating the PFD by mouth. The PFD should still be firm after several hours.
After an inflatable PFD has been inflated using a cylinder, replace the spent cylinder and re-arm it. Because an inflatable PFD is a mechanical device, it requires regular maintenance. Maintain the inflatable portion of the PFD as instructed in the owner’s manual.