Copper Copper pipe is resists corrosion, so it’s commonly used pipe in water supply lines. It costs more than plastic but it lasts! There are two common types of copper pipe Rigid copper, which comes in three thicknesses. Type M is the thinnest but is strong enough for most homes. Types L and Type K are thicker and used in outdoor and . There are two main categories of plumbing pipe plastic and metal. Within those categories, there is PVC plumbing pipe, CPVC .There are many types of plumbing pipes for residential or commercial buildings. Plumbing pipes such as PEX, Copper, and PVC are used normally depending on their application and the location in which they are installed. In addition, there are some other plumbing pipe types such as black, galvanized and brass. Let’s see below the best application .