What is the friction loss for a 5" hose flowing 2000 GPM?

To determine the friction loss in a 5-inch hose flowing at 2000 gallons per minute (GPM), the correct approach is to reference standard friction loss formulas or tables used in fire service operations. For large diameter hoses, particularly in the 5-inch size, friction loss is minimized due to their larger cross-sectional area which allows for a higher flow with less resistance.

The common formula used to calculate friction loss is the "friction loss formula," which indicates that for a 5-inch hose, the friction loss increases at a certain rate per 100 feet of hose depending on the flow rate. When flowing at 2000 GPM, fire service guidelines generally indicate a friction loss of approximately 20 psi per 100 feet. This specific example is aligned with standard calculations or empirical data that fire service operations often rely on.

Given this understanding, 20 psi per 100-foot section accurately represents the anticipated friction loss for the hose size and flow rate specified in the scenario. This information is critical for fire engineers and operators to ensure effective and safe operations, allowing them to adjust pressures and flows as necessary to maintain adequate water supply during firefighting efforts.