If you have a continuous supply of water from a city main averaging 80 psi flow, will friction loss in a fire hose or pipe ever prevent water from flowing out of an opening downstream, assuming there is no elevation gain to overcome? Some friction loss calculations state that EVENTUALLY the friction loss will reduce the pressure so much that the water will stop flowing. Other theories suggest that as long as there is an unlimited and continuous supply of water being pumped into the pipe or hose, and as long as there is atleast .434 psi pushing the water, then the container (hose) will continue to fill until it is full and push the water from the exit point. Even if the pipe is infinity long. Thanks in advance for solving a 40 year fire station kitchen table debate!