The answer to 'average cost of backflow preventer' is that the typical cost range for installing a backflow preventer can vary widely, usually between $300 to $800 or more. The exact cost will depend on several factors, including the type of backflow preventer required, the complexity of the installation, the location and accessibility of the plumbing system, and the labor rates in your local area.
Backflow preventers are an important safety device that help protect the public water supply from contamination. They are often required by local building codes, especially for properties with irrigation systems, commercial kitchens, or other potential sources of water pollution. The cost can also be influenced by whether the backflow preventer needs to be installed above or below ground, and if any additional plumbing work is required to accommodate the new device.