Name a component that helps maintain pressure in a fire sprinkler system.

The pressure regulator or water pressure gauge plays a crucial role in maintaining the appropriate pressure within a fire sprinkler system. The pressure regulator ensures that the water pressure does not exceed a specified limit, which is essential for the effective operation of the sprinkler heads. This control helps prevent damage to the system and ensures that the water is delivered at the required pressure for effective fire suppression.

Additionally, the water pressure gauge provides vital information about the current pressure levels in the system, allowing technicians to monitor the system's performance. Proper pressure maintenance is critical for ensuring that the sprinkler heads activate correctly when needed, delivering an adequate water flow to extinguish fires.

In contrast, while other components like flow switches and water gauges are important, they primarily serve monitoring and alerting functions rather than maintaining pressure directly. The control panel or alarm system plays a role in signaling and activating the sprinkler system but does not directly address pressure maintenance. Fire hydrants and sprinkler heads are integral to fire suppression but are not responsible for regulating or maintaining system pressure.