Assertion: copper tube | /r/HasProperty | dwvtube
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Seamless copper tube used for sanitary drainage, waste and vent systems in plumbing applications is often referred to as "DWV" tube and is manufactured to the requirements of ASTM B 306 - Standard Specification for Copper Drainage Tube (DWV).