Plumbing pipes are essential components of any plumbing system. They come in two main varieties: ELLS and CONDUITS. ELLS are short, curved pieces of pipe that are used to change the direction of a pipe run. CONDUITS are longer, straight pipes that are used to transport water or other liquids from one place to another. Both types of plumbing pipes are made from a variety of materials, including copper, plastic, and steel.