About: http://webisa.webdatacommons.org/290881076

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	Applying heat and using a penetrating oil is a good idea as well since some of the valves are assembled with thread locker, or may be a bit corroded in the tiny threads.
http://www.w3.org/ns/prov#wasQuotedFrom	coffeegeek.com