What is cross connection?

Cross connection refers to the physical connection of pipes that carry drinking water with pipes that contain contaminated water or substances. This can result in the contamination of the drinking water supply and pose a serious health risk to consumers.

Cross connections can occur in a variety of situations, such as when a garden hose is left submerged in a swimming pool or when a hose is connected to a chemical tank. These cross connections can allow backflow, which is the unwanted reversal of the flow of water in a plumbing system.

To prevent cross connections and backflow, it is important to use backflow prevention devices, such as air gaps, check valves, and vacuum breakers. Regular inspection and maintenance of plumbing systems are also essential to prevent cross connections and protect the quality of the drinking water supply.

Many cities and municipalities have regulations in place to prevent cross connections and require the installation of backflow prevention devices in certain situations. It is important for property owners to comply with these regulations and take steps to prevent cross connections in order to protect public health and safety.