When is testing of a backflow protection device required by code, and what does the testing involve?

• A. Before installation to ensure fit.
• B. After installation or relocation of a backflow device; tester checks that device closes properly and prevents backflow under specified conditions.
• C. Only during annual system-wide testing for all devices.
• D. Never; testing is optional.

Answer: (B)

Testing is required after a backflow protection device is installed or relocated. This ensures the unit is installed correctly and will stop backflow as designed. A qualified tester uses a backflow test kit connected to the device’s test ports, cycles the device through its normal and backflow conditions, and checks that the device closes properly and prevents backflow under the specified conditions. The test checks that seals hold, there are no leaks when closed, and any relief or vent functions operate only as designed. A test report is typically filed with the authority having jurisdiction. While initial testing is done after installation or relocation, some devices and codes also require periodic annual testing for ongoing protection depending on the type and local code.