Which of the following devices can check water flow in the distribution system?

A flowmeter is specifically designed to measure the flow rate of water within a distribution system. This device provides crucial data on how much water is passing through a pipe over a certain period of time, allowing operators to monitor usage, detect leaks, and ensure proper system functionality. Flowmeters come in various types, such as mechanical, magnetic, and ultrasonic, each with its own method of measurement but all serving the primary function of tracking flow rates.

While pressure gauges, valves, and filters have important roles in managing a distribution system, they do not have the capability to measure flow rates directly. A pressure gauge measures the pressure within the system, which can indirectly affect flow but does not provide flow measurements. Valves control the flow of water but do not measure it. Filters are designed to remove impurities from water and do not have a function related to measuring flow. Therefore, the flowmeter is the only device listed that can effectively check water flow in the distribution system.