About: http://webisa.webdatacommons.org/76809561

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	My guess - and hope - is that the noise is perhaps air in the pipe, or cavitation, and that there will be no more issues other than the sound.
http://www.w3.org/ns/prov#wasQuotedFrom	sprinklertalk.com