On Tue, 30 Apr 2019 22:51:03 +0100
Steve Walker wrote:

During my 50-odd years, it has been typical of all the 1930's housing
around here for all the cold taps in the house to be mains fed, so
not really a modern thing.

In a couple of 1920s/30s houses I have occupied the only mains water was
at the kitchen sink, everything else came from a header tank in the
loft or airing cupboard.