Plumbers use plastic pipes, such as PVC, PEX, and CPVC, for various reasons. Plastic pipes are lightweight, making them easier to handle and install compared to metal pipes. They are also resistant to corrosion, scale buildup, and chemical degradation, ensuring long-lasting performance. Plastic pipes offer flexibility, allowing for easier installation around obstacles and corners. Additionally, plastic pipes are cost-effective and provide good water flow characteristics, making them a reliable choice for plumbing installations.