What is a Cross-Connection Control Device or Backflow Preventer?
A Cross-Connection Control Device or Backflow Preventer is a device designed to prevent backflow or backsiphonage of contaminated water into the drinking water supply. A cross connection is a link between a possible source of pollution and a potable water supply. A pollutant may enter the potable water system when a) the pressure of the pollution source exceeds the pressure of the potable water source or b) when a sudden loss of pressure occurs in the water system and “backsiphonage” occurs. Water customers are required to maintain their water systems in a manner free of cross-connections. If a backflow incident should occur resulting in contamination of the public water supply, the responsible owner or occupant could be held liable for damages. Fire suppressant systems, lawn irrigation systems, boiler feed water, cooling towers and water softeners are just a few of the locations where Michigan Plumbing Code can require a cross-connection control device. The State of Michigan Plumbing
