What is the function of a water meter in plumbing?

The function of a water meter in plumbing is primarily to measure water usage. This device is installed in a plumbing system to quantify the amount of water that flows through the pipes to a residence or commercial building. By accurately tracking water consumption, it allows for the calculation of water bills, ensuring that customers only pay for the water they utilize. Water meters are essential for managing resources, monitoring leaks, and encouraging conservation, as they provide data that can lead to more efficient water use.

While the other options present functions related to plumbing systems, they do not pertain to the primary role of a water meter. For instance, preventing backflow into the supply typically involves backflow preventers, which are distinct devices designed to stop contaminated water from reversing its flow. Filtering impurities from water is the role of water filtration systems, which are intended to improve water quality rather than track usage. Controlling water pressure is handled by pressure regulators or valves, which manage the force of water within the system. Each of these systems is important, but they serve different functions compared to the measurement capability of a water meter.