Final answer:
Certified fire protection companies typically inspect fire extinguishers every 5 to 6 years, depending on local regulations and the manufacturer’s guidelines to ensure their proper functionality.
Step-by-step explanation:
The frequency at which a certified fire protection company should perform an internal maintenance inspection of the fire extinguisher in your workplace can vary depending on local regulations and the manufacturer’s recommendations. However, as a rule of thumb, most fire extinguishers require an internal maintenance inspection every 5 to 6 years. It’s essential to ensure these inspections are done regularly to guarantee the equipment's functionality in case of an emergency. Additionally, knowing where specific safety equipment, such as the fire extinguisher and the eyewash station, is located in the laboratory is paramount for safety.