Unable to answer "Is the water potable here?" – Spring – https://osm.org/node/360761006 via StreetComplete 60.3:

There is no water coming out of the hose. There is a pipe next to it that could have had a knob of a vent which broke off. So maybe the vent is closed or there is no water from the source, which would also be plausible as there is no water visible in the course of the stream.

Attached photo(s):
https://streetcomplete.app/p/335985.jpg