<http://webisa.webdatacommons.org/prov/110620802> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/343089968> . <http://webisa.webdatacommons.org/343089968> <http://www.w3.org/ns/prov#value> "In practice, this is very important in pool, spa, and other applications in which pump and filter equipment impose a wide range of hydraulic conditions." . <http://webisa.webdatacommons.org/343089968> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.com> . <http://webisa.webdatacommons.org/343089968> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .