How much friction loss occurs for a 5" hose flowing 700 GPM?

To determine the friction loss for a 5-inch hose flowing 700 gallons per minute (GPM), it's important to reference established guidelines and friction loss formulas used in fire hydraulics.

For a 5-inch hose, the common friction loss is approximately 1 psi per 100 feet for flows around 500 GPM. However, as the flow rate increases, the friction loss does too. According to the National Fire Protection Association (NFPA) and various hydraulic calculation manuals, a typical friction loss for a 5-inch hose at 700 GPM can be estimated to be around 2 psi for every 100 feet of hose.

Understanding that friction loss increases with higher flow rates helps to validate why the answer given is appropriate. It reflects the relationship between the internal diameter of the hose, the flow rate, and the resulting pressure loss that occurs as water is pushed through the hose.

This makes the selected answer suitable, given the parameters set forth in hydraulic calculations for fire service operations, enabling engineers and firefighters to effectively manage water supply at emergency scenes.