I'm imagining if we took a large round steel container, we could raise
   it high in the air and fill it with water, and if it were large enough,
   a community with water could have running pressurised water from the
   contents.
   This sounds like a cool idea!
   I found plans on a crypto-anarchist list,
   at [1]https://lists.cpunks.org/pipermail/cypherpunks/2021-December/0930
   65.html , in a thread entitled "build a bomb", for just such a round
   container.
   The rest of the title after "build a bomb", is "out of water".  It's a
   joke, obviously.  Sorry if I scared anybody.
   So let's build this "bomb" designed by Jim Bell!  Specifications for
   how to make a water tower are not exactly easy to come by.  Many
   communities need pressurised water to drink from.
   In his cryptoanarchist plans, Jim Bell describes a spherical steel
   container with a threaded opening (the "bomb" being "built" out of
   water).

References

   1. https://lists.cpunks.org/pipermail/cypherpunks/2021-December/093065.html