Does anyone run multiple pressure Gauges and/or a Vacuum gauge?
I recently had the opportunity to see a very sophisticated Commercial pool equipment room and one of the things I immediately noticed was in addition the the usual pressure gauge on top of the filters, they had installed pressure gauges between the pumps & filter, and also after the filter on the return lines. They also had vacuum gauges installed on the drain plug of every pump. There were also lots of digital gauges and computer screens that were monitoring something as well.
This pool also appeared to have a very complicated liquid chlorine & acid injection system, maybe the gauges are used somehow for that.