So for any one else wondering, I went looking for receipts and it seems to check out. Source material claims to be affiliated with the University of Oxford. The database is difficult to navigate, but i was able to find this link to the 4.08.16 english text.

https://etcsl.orinst.ox.ac.uk/cgi-bin/etcsl.cgi?text=t.4.08.16&display=Crit&charenc=&lineid=t40816.p1#t40816.p1

Even as someone who is way out of depth, the database is interesting to explore.

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It’s difficult to see from the picture provide what you might mean by “kinda open”. Can you provide a picture or may be an example of what is fastened to the valve body opposite the pipe? If you can’t, is what’s depicted in this link what you see? https://www.mcmaster.com/mvC/Library/20210709/7CBF13E4/4627K333_Medium-Pressure Iron Pipe Fitting.PDF

Is that a plug i see there on the end? Have you considered removing it and opening the valve a little to see what comes out?

The future is now, depending on where you live. https://www.bbc.com/news/world-asia-51321661

https://en.m.wikipedia.org/wiki/Dead_reckoning