How To Become a Certified Backflow Preventer Tester

Backflow preventers are essential tools in the field of public health. These devices prevent contaminants from entering the water supply. Since they perform such an important task, a professional must inspect them. This begs the question, what do you need to know about how to become a certified backflow preventer inspector? The answer lies below.


You must take courses to become a certified backflow preventer tester. However, you can’t just enroll in the classes on a whim. First, you have to fill out an application that proves you know a little something about the field. You also need at least five years of experience in the industry. People must fill out applications before classes start to be eligible.


To become a certified backflow prevention assembly tester, you must take a 40 hour training course at an approved testing school. If you want to repair backflow assemblies or work specifically on fire sprinkler systems, you’ll need to take separate courses.

Written Examination

Another aspect of becoming a backflow preventer inspector is the written exam. Yes, sadly, this is an important part of the process. The test can be anywhere from 25 to 100 questions, depending on your jurisdiction. The exam ask about things such as assembly and repair. You should also be able to name backflow preventer parts so that you can show people the benefits of repair over replacement.

Field Test

People must also perform a field test to become backflow preventer inspectors. Essentially, you must prove that you can assemble every part of a backflow preventer without any help. You should understand the importance of a double check valve and pressure vacuum breaker. Believe it or not, the written portion of the exam will help prepare you for the field test.


Backflow tester certifications are valid for three years, after that, you’ll need to be recertified. The recertification process follows the same steps as your original certification but faster. Usually you’ll need to take a one or two day course, take a written exam and then complete a field test. Pass your tests and you’re good to go for another three years.

This article has shown you how to become a certified backflow preventer tester. Backflow Direct understands the importance of certification in the field. We sell certified backflow preventers that have passed their tests for installation. We also sell parts for those who need something fixed. Take a look at our selection today.