Where should pressure gauges be installed in a sprinkler system?

Pressure gauges should be installed above and below each alarm check valve to effectively monitor the pressure within the sprinkler system at critical points. By having gauges positioned in both locations, it allows for the verification of the differential pressure across the alarm check valve. This is important for ensuring that the valve is functioning properly during operation. If there is a significant difference in pressure readings, it may indicate an obstruction or a malfunction that requires attention.

Monitoring the system in this way can also provide insight into the overall health and efficiency of the water supply system that supports the sprinklers. While installing gauges at the system riser or only below the fire pump can offer some information about the overall system pressure, they don't provide the necessary detail regarding the performance of the alarm check valve. Similarly, placing gauges at every junction of piping is not practical or necessary for standard monitoring, as the focus should be on critical components where pressure assessment is crucial for system reliability.