Verona integron-encoded metallo-β-lactamase-producing Pseudomonas aeruginosa (VIM-PA) outbreaks are frequently linked to contaminated sink-drains in the intensive care unit (ICU). This study aims to investigate a VIM-PA outbreak occurring at four ICUs in a Belgian university center. Between the 1st January 2019 and the 30th July 2023, data were retrospectively retrieved. Whole genome sequencing of VIM-PA was carried out for available clinical and sink-drains isolates and the core genome multilocus sequencing typing (cgMLST) was used to confirm clonality. New case incidence was estimated by analyzing the weekly data of at-risk and VIM-PA colonized patients, fitting a gamma regression with a log link. Fifty-one patients were colonized, among them 32 (63%) were infected by VIM-PA, which contributed to 7 deaths. The outbreak investigation showed that 19 (47%) of the examined sink-drains grew at least once a VIM-PA. Two major clusters were observed by cgMLST: ST 111 (59 clones with 40 clinical isolates), and ST17 (8 clones with 6 clinical isolates). The estimated incidence rate of new cases was significantly higher in one ICU. A five-year prolonged outbreak at the ICU of the UZ Brussel was caused by only two VIM-PA clones, both linked to sink-drains, with minimal mutations occurring throughout the years. Statistical modelling found different incidence rates between units. Tailored interventions were hence prioritized.