About: http://webisa.webdatacommons.org/405625562

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Where the pumping system is a fixed speed system, HS is determined by measuring differential pressure (DP) across the headers and subtracting therefrom an overpressure (OP) measured downstream of the outlet header.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com