When a hole is made in the CO2 cartridge of a personal flotation device that automatically fills with air, it needs to be replaced. This happens when it inflates itself when the person wearing it gets into the water. When the manual lever is used to pump up the PDF, the cartridge is also pierced.
Also, you can blow up this PDF by blowing into the tube that goes in your mouth. But this doesn’t make a hole in the CO2 cartridge.
Before using an inflatable PDF, it should be checked to make sure it is safe. The cartridge is taken out and the PDF is inflated by mouth to make sure there are no leaks in the vest itself. The cartridge is looked at to make sure it hasn’t been used before. After the mechanism has been replaced, it is checked to make sure it is tight and not leaking.