The answer to 'how much does backflow preventer cost in Illinois' is that the cost can vary significantly depending on several factors. Backflow preventer installation and maintenance costs in Illinois typically range from $500 to $2,000 or more, depending on the size, complexity, and location of the system.
The main factors that influence the cost of a backflow preventer in Illinois include the type of device required (reduced pressure zone, double check valve, or atmospheric vacuum breaker), the size and complexity of the plumbing system, the accessibility of the installation location, and any necessary permits or inspections. Additionally, labor costs can vary based on the plumber's experience and the local market rates.