About: http://webisa.webdatacommons.org/181385300

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	Drip valves, in particular, have a real problem getting enough back pressure to close, especially if there is a very small volume flowing through the zone to start with.
http://www.w3.org/ns/prov#wasQuotedFrom	sprinklertalk.com