A sprinkler system's air pressure must be maintained at how many PSI above the trip point?

The correct answer is that a sprinkler system's air pressure must be maintained at 15-20 PSI above the trip point. This range is essential for ensuring the proper operation of the sprinkler system in the event of a fire.

When the heat from a fire causes the detection element (typically a glass bulb or fusible link) to activate, the air pressure in the sprinkler system needs to be sufficient to ensure that the water can be released effectively. If the air pressure is too low, it could lead to delayed activation of the system, reducing its effectiveness in suppressing the fire.

Maintaining the air pressure within this specified range ensures rapid and reliable system activation and contributes to the overall efficiency and effectiveness of the fire suppression capabilities of the sprinkler system. Proper pressure settings also help prevent issues such as premature activation or malfunction due to fluctuations in system pressure.