It’s not necessary. I’ve worked in the industry since 1988 and the powder is charged with dry nitrogen. I’ve seen units that sat for 30 years discharge just fine. They are far more durable than articles like this suggest.

For the most part, the standard dry chemical extinguishers you buy are not going to need anything more than a quick check to make sure the gauge is up in the normal operating pressure area (usually 195psi). Turning the extinguisher upside down does nothing beneficial. These types of units are charged with dry nitrogen…