The answer to how much a backflow preventer costs in Chicago is that the price can vary significantly depending on several factors. Typically, the cost for a basic backflow preventer installation can range from $500 to $1,500, but more complex setups or specialty devices may cost more.
The exact price will depend on the type of backflow preventer required, the size and complexity of the plumbing system, the accessibility of the installation location, and the labor rates of the licensed plumber performing the work. It's important to get quotes from multiple local plumbers to compare prices and ensure you're getting a fair rate for your specific needs.