CPV code 42131145 designates Check valves in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
42131145 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 42131140 (Pressure-reducing, control, check or safety valves).