What is the total friction loss for a 15/16" nozzle with 75' of 1 ¾" line at 185 GPM?

To determine the total friction loss for a 15/16" nozzle with 75 feet of 1 ¾" line at a flow rate of 185 GPM, we can apply the standard formulas used in fire hydraulics.

First, it's important to know that friction loss in hose lines is calculated using a formula that incorporates both the diameter of the hose and the flow rate. For 1 ¾" diameter hose, the friction loss can be approximated using a well-established rule of thumb: for every 100 feet of hose, the loss increases by a certain number of pounds per square inch (PSI) based on the flow rate, measured in gallons per minute (GPM).

At 185 GPM, the friction loss for 1 ¾" line is approximately 40 PSI per 100 feet. Since the hose length is 75 feet, we can calculate the friction loss for that length. The calculation would typically involve taking the 40 PSI per 100 feet and determining the equivalent pressure loss for just 75 feet, which translates into 30 PSI (40 PSI/100 feet * 75 feet).

Next, we account for the nozzle. For a 15/16" nozzle flowing at 185 GPM