All are not created equally! Hose, Nozzles, even Pumps have small differences that affect the final performance. When training with fire streams, ensure that you are flowing the correct pressure and gallonage. If we train with the incorrect flow, we are training ourselves with an inappropriate feel of our equipment and that can lead to deadly consequences. Test and know your flows from each nozzle, hose line, and check for accurate pump discharge pressure.
Below is a link to some flow and pump testing done by an organization to confirm accuracy of their equipment. These numbers may not be the same as our equipment, but an example of the important information needed to accurately know your flow.