The sewer lines must be in both good physical and chemical conditions, and must comply with standards before their installation. In order to preserve their quality, their storage must be taken care of meticulously. For this purpose, our work will be based on the study of pipeline samples using infrared spectroscopy. This technique allows us to characterize and identify organic and inorganic compounds in samples, as well as monitor chemical reactions and structural changes that may occur over time. The samples were developed by four different Moroccan companies, allowing us to obtain a variety of representative data. To assess the effect of aging on pipelines, we submitted our prepared samples to two different sulfate solutions: sulfuric acid and sodium sulfates. These solutions represent potential environmental conditions to which the pipelines could be exposed to after being put into service. We compared the aged samples with virgin samples that were not exposed to ultraviolet (UV) radiation from natural light in order to specifically observe the changes induced by aging. The results obtained were significant. They showed the appearance of a structural change between virgin and aged samples.