In order to protect the integrity of the potable water supply, certain classes of commercial and industrial water customers, and all fire protection lines, must be fitted with devices that prevent the reintroduction of water which potentially could carry contaminants back to the public water supply. All commercial and industrial water customers must install an approved cross connection control device to be easily accessible for inspection and maintenance. Specific information regarding the installation, use and testing of back flow prevention devices can be obtained by contacting Trey Burnette at 615-643-4531.