> What is the rate of flushing in the line to an apartment building
depending on the height of the building - anything more than 6 floors - the water you are drinking is likely pumped to tanks on the roof and fed back down ... want to know what else might be in those tanks? https://www.youtube.com/watch?v=P_9RLbRZJr0
TLDR: I would worry a lot more about the water you put in your mouth sitting in faeces overnight than it sitting in a plastic tube for a week.
depending on the height of the building - anything more than 6 floors - the water you are drinking is likely pumped to tanks on the roof and fed back down ... want to know what else might be in those tanks? https://www.youtube.com/watch?v=P_9RLbRZJr0
TLDR: I would worry a lot more about the water you put in your mouth sitting in faeces overnight than it sitting in a plastic tube for a week.