In a jacketed fire hose, what is the function of the outer jacket?

The outer jacket of a jacketed fire hose plays a critical role in providing strength against water pressure. This outer layer is specifically designed to withstand the high pressures that can occur when water is pumped through the hose during firefighting operations. The combination of the inner lining, which is usually made of a rubber or synthetic material, and the outer jacket, typically made from a durable fabric, creates a hose that can endure the demanding conditions of firefighting.

While insulation, flexibility, and aesthetic enhancements may be desirable features in various types of hoses or equipment, the primary function of the outer jacket in this context is its ability to reinforce the hose against the interior pressure, ensuring that it can operate safely and effectively under the stressful conditions typically found in firefighting scenarios. This strength is essential for the reliability and safety of fire operations.