What general term describes devices that manage or reduce water pressure?

The term that best describes devices that manage or reduce water pressure is "Pressure Regulating Devices." These devices serve a crucial role in controlling the water pressure within a system to ensure that it remains at an optimal level, protecting plumbing fixtures and equipment from potential damage caused by excessive pressure.

Pressure regulating devices can adjust the pressure automatically based on the fluctuating demands of the system, ensuring that water is delivered at a consistent and safe pressure. This ability to maintain stable pressure levels is critical in fire suppression systems, where incorrect pressure can affect the performance and effectiveness of firefighting efforts.

In contrast, while "Pressure Relief Devices" are focused specifically on relieving excess pressure to prevent system failure, and "Pressure Control Devices" could encompass a range of devices including both relieving and regulating, "Pressure Regulating Devices" specifically indicates those that continuously manage pressure, aligning directly with the question's focus. "Water Management Devices" is a more general term and does not specifically imply pressure management.