For fire apparatus with tanks greater than 1000 gallons, what is the required tank fill line?

For fire apparatus equipped with tanks greater than 1000 gallons, the required tank fill line is 2 inches in diameter. This specification is designed to ensure efficient and rapid filling of large water tanks during fire operations or when refilling at hydrants or water sources.

A 2-inch fill line allows a significantly higher flow rate, which is crucial when time is of the essence during emergency situations. Larger tanks need to be filled quickly so that firefighters can return to active duty without unnecessary delays.

In contrast, smaller fill line diameters, such as 1 inch or 1.5 inches, would restrict the flow, making it time-consuming to fill larger tanks, which is not practical during a fire emergency. Thus, a 2-inch fill line is the optimal choice to accommodate the needs of fire apparatus with larger water tank capacities, enhancing operational efficiency.