Defects in sanitary fittings are common issues that can arise in both residential and commercial buildings due to poor installation, substandard materials, wear and tear, or inadequate maintenance. Understanding these defects is essential in building services and maintenance, as they directly affect hygiene, functionality, water efficiency, and the longevity of plumbing systems. Sanitary fittings include items such as water closets, wash basins, urinals, sinks, faucets, shower fittings, bathtubs, and associated piping and drainage systems. The defects in these fittings can be categorized based on their nature, causes, and impact on building services. One of the most frequent defects in sanitary fittings is leakage. Leakage can occur due to loose joints, cracks in the ceramic or plastic components, or deterioration of washers and seals. For example, a leaky faucet or tap may result from a worn-out rubber washer or improper assembly, causing continuous dripping and wastage of water. Similarly, water closets may develop leaks due to faulty flappers, cistern overflow, or corrosion in flush pipes. Leakage not only wastes water but also damages surrounding fixtures, walls, and floors, potentially leading to structural issues if not addressed promptly. Another common defect is clogging or blockage in sanitary fittings. Sinks, wash basins, bathtubs, and drains can get blocked due to the accumulation of debris, hair, grease, or foreign objects. Blockages reduce the efficiency of drainage systems and may cause backflow, unpleasant odors, and unhygienic conditions. In commercial buildings, persistent blockages can disrupt normal operations and increase maintenance costs. Effective cleaning, regular inspection, and the use of proper strainers and traps are preventive measures to minimize such defects. Cracks and fractures in sanitary fittings are another critical defect. These defects can appear in water closets, sinks, urinals, and bathtubs due to mechanical impact, sudden temperature changes, or manufacturing defects. Cracks in ceramic or porcelain fittings can lead to water leakage, unsightly appearance, and further deterioration over time. In some cases, micro-cracks may not be immediately visible but gradually expand under constant use, necessitating replacement. Proper handling during installation and avoiding excessive mechanical stress are essential to prevent such defects. Corrosion and scaling are also significant issues in sanitary fittings, particularly in areas with hard water. Metal faucets, pipes, and connectors are prone to corrosion if water contains high levels of dissolved salts or if fittings are made of low-quality materials. Corrosion can weaken the structure, cause leaks, and reduce the efficiency of the fittings. Scaling, caused by the deposition of calcium and magnesium salts, can block small passages in taps, showerheads, and flush systems, affecting