Things like this do happen from time to time. Normally, hotels try to give you notification a day or two early so you can make plans if needed. Look on the bright side, they could have shut off the water at 6:00am instead of pm. Then just think of the weeping and knashing of teeth that would have occured.

In general, I agree that 1K isn't very much. But given that in a hotel, there are times that the water has to be shut off. No way around it and form your post, it looks like the hotel did most everything else pretty well. So the question is how much should one be compensated on something that does have to happen periodically? And yes, I understand that the wait may have been longer than they anticipated, but once something like that is started, it has to be finished. And that can sometimes take a little longer than normal. What I might do is to write them a nice comment. I might thank them for trying to set a time where there would be less customers adversely affected (i.e. evening rather than morning). I would then suggest that they give more notice in the future to allow for their customers to make other plans if needed.