This is the fastest possible water loading and unloading station in Factorio using fluid wagons. The blueprint is for 1:4 fluid wagon trains and it takes 104 game ticks to load the fluid wagon train and 105 game ticks to unload it. If you are wondering why there is 1 tick difference between loading and unloading is due to the presence of 2 pumps between the train and the station. During loading since there is constant flow of water there is no latency, but that extra pump shows up as 1 latency during unloading (2 pump setup is necessary for speed btw). The use of fluid wagons instead of storage tanks is the key to the fast loading/ unloading speeds!
Blueprint for the stations:
https://factorioprints.com/view/-MaxmjHt1WaRqnpwOpLq
