What is the recommended RPM for the apparatus during drafting operations?

During drafting operations, maintaining the apparatus at approximately 1000 RPM, or fast idle, is crucial for several reasons. At this RPM, the fire pump operates efficiently while providing adequate vacuum to draw water from the source. This balance ensures that the pump has enough power to overcome the resistance created by the drafting process without overworking the engine.

When drafting, the primary goal is to create sufficient pressure in the pump to lift water from a static source, such as a lake or pool. If the RPM is too low, the pump may not generate enough vacuum, resulting in inadequate water supply or cavitation. Conversely, setting the RPM too high could lead to unnecessary engine strain and fuel consumption, potentially affecting the performance and longevity of the fire apparatus.

Therefore, the recommendation of approximately 1000 RPM during drafting operations provides a sweet spot that promotes system effectiveness, safety, and operational efficiency.