I'm working on an existing system in a seven-story building. There is an existing pump and piping which snakes its way through the building.
There is a pressure gauge at the inlet and outlet of the pump, but none afterward until 200' away from the pump room. The pipe branches off with a zone valve assembly with pressure gauge serving that floor area, and then upwards through the remaining floors with no gauge.
Zone valve assemblies with gauges are located on the floors above.
Now for my question - when performing hydraulic calculations, where would you indicate the "bottom of riser"?
Thanks in advance.
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