What is backflow and how can it be prevented?
Backflow occurs when there is a change in water pressure that causes water to flow backwards in a water distribution system. An example of this would be when a hose is being used outside to water the garden and someone inside of the house turns on the water. A loss of pressure might occur. If backflow occurs while a drinking water supply is in direct contact with a contaminated water supply, the drinking water can become contaminated.
