One of the more popular articles here is the Fresh Water Transfer Methods; I posted over a year ago. These worked fine for our Starcraft and Fleetwood tent trailers, which had 20 and 26 gallon capacities (including the water heater).
Our Milan is a different animal. It has 100 gallons of fresh water capacity, plus the water heater. Not having to replenish the water has been a camping pleasure. We have gone up to two weeks without the need to add water.
But eventually on one of our long trips, we are going to run out of water. The small capacity solutions we have used in the past aren’t going to be convenient. So I went searching for a new solution.