CPV code 42912000 designates Liquid filtering or purifying machinery and apparatus in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
42912000 sits under 42910000 (Distilling, filtering or rectifying apparatus) and groups 2 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.