Assertion: lead pipe | /r/HasProperty | approved by national plumbing codes
Facets:
value: into the 1980s
type: TEMPORAL
Source sentences:
text: Due to its toxicity, most cities moved away from lead water-supply piping by the 1920s in the United States, although lead pipes were approved by national plumbing codes into the 1980s, and lead was used in plumbing solder for drinking water until it was banned in 1986.