The maintenance and replacement of a fire extinguisher depends on the type of extinguisher. Wet chemical fire extinguishers should be tested every 5 years. Dry chemical fire extinguishers should be hydrostatically tested every 12 years, with general maintenance conducted every 6 years.Click to see full answer. Correspondingly, how often should you replace your fire extinguisher? every 12 years One may also ask, do home fire extinguishers have an expiration date? The truth is that most fire extinguishers do not come with an expiration date, and it can be challenging to know exactly when to replace your fire extinguisher. There is no exact, set number of years that you can have an extinguisher before it is considered “expired.” Also asked, how many years is a fire extinguisher good for? between five and 15 years What happens when fire extinguishers expire?Simply put, you should not use an expired fire extinguisher. However, with proper care and maintenance, your fire extinguisher should be able to last 10 – 12 years. In the event that your fire extinguisher is no longer safe to use, we can also provide you with a new one.