What is a requirement for a dry hose (gravity discharge) system?

A dry hose (gravity discharge) system requires that there are no shut-off valves beyond the meter to ensure effective water flow and prevent backflow. By design, these systems rely on the gravitational force to facilitate the discharge of water, which means that if any shut-off valves are present downstream of the meter, they could impede the flow or create stagnation in the system. This can lead to contamination or inefficiencies in discharge. The gravity discharge method is effective because it allows for a continuous flow of water directly to where it is needed without unnecessary interruption. Therefore, keeping the system free of additional shut-off valves simplifies operation and ensures optimal performance.