The answer to 'lifespan of backflow preventer' is that a properly installed and maintained backflow preventer can last 10-15 years on average. Backflow preventers are critical safety devices that protect your home's drinking water from contamination by preventing water from flowing back into the public water supply. With regular inspections and testing, a quality backflow preventer can provide reliable service for over a decade.
The actual lifespan of a backflow preventer can vary depending on factors like water quality, usage, and installation conditions. Preventers installed in areas with hard water or high debris may need more frequent replacement. Proper maintenance like annual testing and cleaning can also extend the lifespan. If you notice any issues like leaks or damage, it's best to have a licensed plumber inspect the device right away.