According to NFPA 291, fire hydrants capable of flowing 500 to 999 gallons per minute at 20 psi should have their bonnets painted which color?

According to NFPA 291, fire hydrants capable of flowing between 500 to 999 gallons per minute at a pressure of 20 psi should indeed have their bonnets painted orange. This color designation is part of a standardized system intended to provide visibility and information regarding the flow capabilities of fire hydrants.

The use of orange for this range indicates a moderate flow capacity, making it easier for firefighters to quickly assess the available water supply during an emergency. This color coding system is crucial for enhancing the operational efficiency of fire departments, as it allows for immediate recognition of a hydrant's capabilities, which can significantly impact firefighting strategies.