What is a common method for measuring flow in a water distribution system?

The use of flow meters is a common method for measuring flow in a water distribution system because they provide precise and continuous measurements of water flow rate. Flow meters can accurately quantify the volume of water moving through pipes, which is essential for monitoring system performance, ensuring adequate water supply, and managing demand. They can come in various types, such as ultrasonic, electromagnetic, and mechanical meters, each suited for different applications within the system.

In contrast, visual inspections do not provide quantitative data about flow rates; they can only offer a general assessment of the system's condition. Water sampling is primarily used for quality analysis rather than flow measurement, and pressure testing is aimed at checking the integrity and strength of pipes rather than measuring how much water is moving through them. Thus, flow meters remain the primary instrument for accurately assessing flow in distribution systems.