Folks,
Yes, ethanol can be removed with water and there are “kits” on the market to do it.
However, it requires decanting fuel several times which is not best practice at home. In addition, it is a slow process and the kits normally only handle 10 litres at a time so a tankful is not a 5 minute job.
Last year we considered and discussed it at length in a local all-makes club and one member bought a kit. In the end, the conensus was that it is not a practical solution for anybody who uses more than a gallon a week and, from a safety point of view, probably best avoided.
B……
Bernie