Which of the following is NOT part of the inspection procedure for fire extinguishers?

The manufacturer's date provides crucial information about the extinguisher's age and potential service life. Understanding this date can help determine maintenance needs and predict when replacement or recharging may be necessary. Therefore, inspecting the manufacturer's date is indeed an important part of ensuring that the extinguisher is reliable and within its serviceable life.

The other aspects of the inspection procedure, such as checking the pressure gauge, confirming that the extinguisher feels full, and ensuring there are no obstructions that could impede access or visibility, are standard practices aimed at confirming the extinguisher’s readiness and effectiveness in an emergency. Each of these checks plays a vital role in maintaining safety standards and ensuring that a fire extinguisher is fully functional when needed.