I watched a video that uses gravity to boil water just by lifting it and lowering the pressure. explanation is better in this video
https://www.youtube.com/watch?v=hHNoHhbfFDQ
so I’m running the scenario through my head of lifting the bottle to the point of “cold” boil then lowering it down (while keeping the hose above boil level to avoid contamination from the original) and I’m trying to figure out what the issue would be.
would the water vapor never condense until a temperature change happened, would it be too slow at distilling since there can only be as much water vapor can only be as much as the container?
what are the flaws or limitations
Raising it lowering the container works only if it is not protected from environmental pressure - but you’re right: creating two different pressure environments that are somehow connected is ready in a thought experiment but then you tell that to the engineer and they get their third heart attack of the week…