What is the purpose of a pressure regulator in plumbing?

The purpose of a pressure regulator in plumbing is to reduce water pressure to a safe and manageable level, preventing potential damage to pipes, fixtures, and appliances. High water pressure can lead to issues such as leaks, burst pipes, and excessive wear on plumbing fixtures. By controlling and lowering the pressure of the water entering a home or building, the regulator ensures that the plumbing system operates efficiently and helps to extend the lifespan of the plumbing infrastructure. It is an essential component in maintaining system integrity and safety.

Other functions mentioned in the options—such as increasing water temperature, measuring flow rates, or filtering impurities—are not roles served by a pressure regulator. Instead, those tasks are typically associated with water heaters, flow meters, and filtration systems, respectively. Understanding the specific role of a pressure regulator is crucial for effective plumbing system design and maintenance.