About: http://webisa.webdatacommons.org/171208459

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	This lets you put bolts anywhere safely.In the photo below there is a triple layer of PVC (pipe, fitting, added layer) where the pressure gauge is mounted.
http://www.w3.org/ns/prov#wasQuotedFrom	spudfiles.com