The answer to how much a backflow preventer costs in Illinois is that the price can vary significantly depending on several factors. Typically, the cost for a backflow preventer installation in Illinois can range from $300 to $1,000 or more, including both the device and the labor.
The exact cost will depend on the type of backflow preventer required, the complexity of the installation, the plumber's labor rates, and your location within Illinois. Larger, more complex backflow preventers for commercial or industrial applications tend to be on the higher end of the price range. Additionally, the cost can be influenced by any necessary permits, inspections, or additional plumbing work required. It's best to get quotes from local licensed plumbers to determine the specific cost for your home or business.