What is the fluid carried by a piping system with hand wheels colored red?

The fluid carried by a piping system with hand wheels colored red is firemain. In naval operations, red signifies the fire protection systems, which includes pipes that are specifically designated for transporting water used in firefighting efforts. This is crucial for emergency situations where rapid access to water is necessary to combat fires onboard a ship or in naval facilities. The firemain system is distinct from other piping systems since its primary purpose is related to safety and firefighting operations, making the color-coding an important visual cue for personnel to quickly identify and access the needed resources during emergencies. Understanding the significance of these color codes aids in efficient damage control and emergency response.