What type of pipe is generally used for water supply?

Galvanized pipe is often used for water supply systems, especially in older constructions. This type of pipe is made of iron that has been coated with a layer of zinc to protect it from corrosion and rust. The zinc coating helps to prolong the life of the pipe, allowing it to transport water safely. Historically, galvanized steel pipes were favored because of their durability and resistance to corrosion compared to uncoated steel.

While other materials like PVC, CPVC, and cast iron have their applications in plumbing, galvanized pipes have unique characteristics that made them a popular choice for water supply lines in the past. It is essential to note that while galvanized pipes are still found in many existing systems, other materials, such as copper or plastics (like PVC and CPVC), are now more commonly used in new installations due to factors such as weight, ease of installation, and cost. However, in the context of traditional water supply systems, galvanized pipes have played a significant role.