Why it is important to test your backflow devices ?

Backflow is the backward flow of water through a pipe. The normal direction of water flow is from the utility water main to homes or businesses. The backflow of water from a home plumbing system into community drinking water happens when water is pulled backward due to a pressure loss in the utility main pipe or pushed back by a pressure source like a well pump. Backflow devices are mechanical plumbing devices installed in a plumbing system to prevent water from flowing backwards and contaminating the public water system. A properly tested and maintained backflow device can prevent the backflow of water of an unknown quality from backflowing into the community water system. Ohio requires that backflow devices be tested once a year.