This Pipe Loops installed in series downstream from highrise rooftop storage tank should serve to reduce Water Pressure supplied to lower-floor households.
I tried all kinds of Google Search terms, but found no result close enough in explaining what this Pipe Loop is officially called and how exactly it is supposed to work, like:
(1) Does such a loop reduce water pressure? If so, how does it work?
(2) Does the loop reduce Static Water Pressure downstream?
Are they any web resources that further explains how the loop reduces water pressure?
Or could it be that a PRV/Pressure Reducing Valve is central to the function in the curious loop structure and the loop itself is not as interesting?