Most control valves in a water distribution system are intended to do what?

• A. Start and stop flows
• B. Filter debris
• C. Regulate pressure continuously
• D. Lock flow during maintenance

Answer: (A)

The main idea is that most control valves in a water distribution system act as gates to start or stop flow. They’re used to open and close the path so water can be supplied to or cut off from a section, enabling isolation for service, maintenance, or switching supply between zones. Debris filtering is the job of strainers or filters placed upstream, not the valve itself. Continuous pressure regulation is handled by dedicated pressure-regulating valves, not the typical control valve. While closing a valve can halt flow for maintenance, the primary purpose of these valves is to control on/off flow rather than continuously regulate pressure or filter debris.