What is a pressure reducing valve (PRV) and what issues might indicate a malfunction?

• A. A device that reduces flow rate to protect downstream equipment; signs of failure: sudden flow increases.
• B. A device that maintains downstream pressure; signs of failure: fluctuating downstream pressure, leaks, noise, or valve not fully closing.
• C. A device that monitors water quality; signs: color change.
• D. A device that adds chemical disinfectant; signs: odor change.

Answer: (B)