About: http://webisa.webdatacommons.org/353727459

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	Your ball valve would be great, if the ball is a floating ball, it will open if the water drops and close when it rises.
http://www.w3.org/ns/prov#wasQuotedFrom	hobiecat.com