The drinking water for our house is stored in a tank up the hill behind the house (10m above the roof line, so we can run sprinklers on the roof in the event of a big fire and simultaneous power outage).
We catch the water in a smaller tank below the house, then use a fire pump to get it up to the big tank. This is inconvenient and costs money every time we pump.
So, our good friend Phil Dorman came to the rescue with a surplus vertical axis windmill kit he had lying around his place:
Jeremy built it while he was staying with us, Chris and I put in the foundations, Annette and Christina painted it and we all had a bit of fun erecting it.