The answer to 'pressure regulator replacement frequency' is that most pressure regulators should be replaced every 5-10 years, or whenever they start to malfunction. Pressure regulators are an important component of a home's plumbing system, responsible for reducing the incoming water pressure to a safe level for the home's pipes and fixtures. Over time, the internal components of a pressure regulator can wear out, leading to issues like fluctuating water pressure, leaks, or the regulator failing completely.
It's generally recommended to have a plumber inspect your home's pressure regulator every 5 years or so to check its condition. If the regulator is starting to show signs of wear, it's best to replace it proactively before it fails completely and causes water damage in your home.