wilber1 wrote:
No, it does not increase the pressure, it increases the velocity. If you attached another hose to the end of that nozzle and put a pressure gauge immediately downstream, the pressure would be lower. If you blocked that hose, the pressure would be the same on both sides of the nozzle.
At the end of that nozzle you have reduced flow to increase output pressure. Same thing that happens in an automatic transmission. It reduces flow to certain valves in a series of valves to increase pressure and flow going into other valves.