What is the maximum time period between having a backflow device tested by a certified backflow tester?

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Multiple Choice

What is the maximum time period between having a backflow device tested by a certified backflow tester?

Backflow prevention devices must be tested regularly to ensure they will protect the drinking water system when needed. The standard practice is to have the device tested by a certified tester at least once every 12 months. This annual interval helps catch any malfunction or wear before contamination could occur, and testing is often required after installation or after any repair that could affect operation. While some situations with very high hazards might call for more frequent testing, extending tests beyond a year increases the risk of undetected failure, which is why the maximum interval is one year.

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