About: http://webisa.webdatacommons.org/355056499

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	From my experience it not buildup on the flapper that causes them to leak.Rather the flappers is sitff and hard.In most cases there are only a few dollars and a minute to replace.
http://www.w3.org/ns/prov#wasQuotedFrom	bobvila.com