The answer to 'how much does backflow preventer cost in Chicago' is that the cost of a backflow preventer can vary significantly depending on several factors. Backflow preventers are an important safety device required in many plumbing systems to prevent contaminated water from flowing back into the clean water supply.
Typical backflow preventer costs in the Chicago area can range from around $500 to $2,000 or more, depending on the size, complexity, and specific requirements of the installation. Factors that influence the cost include the type of backflow preventer (e.g. reduced pressure zone, double check valve), the size of the pipe, whether it requires a concrete vault or enclosure, and the labor required for proper installation. It's best to get quotes from licensed plumbers in your local area to get an accurate estimate for your specific needs.