The city is considering a new bylaw that would help protect drinking water. The bylaw would apply to backflow prevention devices, which keep contaminants out of the drinking water supply. The devices are not to be confused with the valves that prevent sewage from backing up into homes during flooding. Though the city requires all new buildings to have a backflow prevention device installed, the proposed bylaw would require the devices to be inspected regularly. There's currently no legislation that regulates maintenance after the devices are installed. Initially, the bylaw would apply only to commercial, industrial and high-rise apartment buildings. If passed, it would be phased in for residential homes within the next few years..." Hamilton Spectator, October 14, 2009