The answer to 'how much to fix backflow preventer local' is that the cost can vary widely depending on several factors. Backflow preventer repair and replacement typically ranges from $150 to $800 or more, depending on the complexity of the job, the type of backflow preventer, and your local market rates.
The backflow preventer is a crucial plumbing component that prevents contaminated water from flowing back into the clean water supply. Fixing issues with a backflow preventer often requires specialized knowledge and equipment, so it's generally best to hire a licensed, experienced plumber for this task. They can assess the problem, determine the necessary repairs, and provide an accurate estimate for the work.