What device is required at a hose connection if the pressure exceeds 100 lbs?

When the pressure at a hose connection exceeds 100 pounds per square inch (psi), a pressure regulating device is necessary to ensure the safety of the system and the equipment being used. High pressure can lead to potential damage to hoses, fittings, and appliances connected to the water supply, increasing the risk of ruptures or leaks.

A pressure regulating device helps to maintain a consistent and safe pressure level, protecting the integrity of the equipment and ensuring a reliable flow of water during operations. This is particularly important in firefighting and other applications where precise control of water pressure is crucial for effectiveness and safety.

While other devices like backflow preventers, flow meters, and automatic shutoff valves serve important functions—such as preventing contamination of the water supply, monitoring flow rates, and controlling downstream flow respectively—they do not specifically address the need to regulate and maintain safe pressure levels at hose connections. Thus, the requirement for a pressure regulating device in situations of elevated pressure is essential for promoting operational safety and equipment longevity.