What is required to prevent accidental activation of a dry pipe valve?

To prevent accidental activation of a dry pipe valve, increasing air pressure is crucial because dry pipe systems rely on air pressure to keep the valve closed. In a dry pipe system, the pipes are filled with pressurized air, and this pressure holds the valve in a closed position. If there were to be a drop in air pressure, it could lead to the valve opening unintentionally, allowing water to flow into the pipes. By maintaining or increasing the air pressure to the appropriate levels within the system, you can ensure that the dry pipe valve remains in its closed position until the system is activated by a fire event.

The other options focus on aspects that do not directly influence the valve’s mechanism of operation. Lowering the system temperature does not prevent activation; rather, it can lead to conditions that might freeze the pipes. Maintaining water pressure is irrelevant in a dry pipe system since water is not present in the pipes until the valve is activated. Regular system testing is important for overall system reliability but does not specifically address the prevention of accidental activation of the dry pipe valve itself.