What type of maintenance do backflow preventers require?
Backflow preventers have to be tested within 10 days of initial use. Backflow preventers then have to be re-certified annually. Testing and re-certifying are the owner’s responsibility. All testing and certification must be completed by a certified backflow tester.

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1. What is a backflow preventer?
2. Are all backflow preventers the same?
3. What are the different types of backflow preventers?
4. What type of maintenance do backflow preventers require?