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Why do backflow prevention devices need to be tested?

April 26, 2017backflow Devices prevention tested

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Why do backflow prevention devices need to be tested?

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A backflow prevention device may not show visible signs of failure. Backflow prevention assembly devices contain internal seals, springs, and moving parts that are subject to fouling, wear, or fatigue. A backflow prevention assembly device, such as Double Check Valve Assembly (DCVA), or Reduced Pressure Principle Backflow Prevention Assembly (RP), must be tested by a certified individual as listed in Schedule 6 of the bylaw (chapter 681) with a properly calibrated test gauge.