What is necessary in a water supply system to control the water supply in some portion of the installation?

In a water supply system, controlling the flow and distribution of water is essential for efficient operation. A valve serves this important purpose by allowing or restricting the flow of water through the pipes. By adjusting a valve, system operators can control the amount of water that flows to specific areas or appliances in the installation.

Valves can be used to isolate sections of the system for maintenance, repair, or in case of a leak. They come in various types, including gate valves, ball valves, and check valves, each designed to perform specific functions within the system. The ability to regulate the flow or shut off water entirely in certain sections is crucial for safety and function, making the valve a fundamental component of water supply systems.

Other options may play supportive roles in a water supply system but do not directly control flow in the same way that a valve does. A filter cleans the water, a regulator manages pressure, and a meter measures the volume of water used, but none of these can directly adjust the flow like a valve can.