Water - Its Rise and Fall

[Road Dog]

A Forum newbie here. How was water supplied to (and drained from) skyscrapers or proto-skyscrapers in Manhattan before, say, 1940? Were water tanks used, and, if so, up to what height, and how was pressure maintained at the upper stories? My special interest centers on the apartment buildings of Emery Roth (San Remo, Beresford, Normandy, etc.), and I have always wondered whether the towers atop these structures actually housed water tanks. I will look forward to responses and to a better New Year!