The answer to 'backflow preventer installation cost' is that the cost can vary significantly depending on several factors. Backflow preventer installation typically ranges from $300 to $1,500 or more, depending on the type of preventer, the complexity of the installation, and the labor required.
The main factors that influence the cost include the type of backflow preventer (e.g., reduced pressure zone, double check valve, or atmospheric vacuum breaker), the location and accessibility of the installation, the need for any additional plumbing work, and the labor rates in your local area. It's important to get quotes from licensed and experienced plumbers in your local area to get an accurate estimate for your specific project.