What is the most commonly used material for CWL?

The most commonly used material for Cold Water Lines (CWL) is PVC (Polyvinyl Chloride). PVC is favored for its strong resistance to corrosion, lightweight nature, and ease of installation. Additionally, it is unaffected by chemicals found in water supply systems, which makes it a durable choice for cold water piping. Its versatility and low cost further contribute to its widespread use in both residential and commercial plumbing applications.

PPR (Polypropylene Random Copolymer), GI (Galvanized Iron), and CPVC (Chlorinated Polyvinyl Chloride) are also materials used in plumbing but have different applications and properties. PPR is less common compared to PVC for cold water lines, GI can be susceptible to rust over time, and CPVC is typically used for hot water systems rather than for cold water. Thus, the choice of PVC represents the most efficient and popular option in the context of cold water lines.