CPV code 45232154 designates Construction work of elevated tanks for drinking water in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
45232154 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 45232150 (Works related to water-distribution pipelines).