A Street Elbow 45° is a plumbing fitting designed to redirect fluid flow in a plumbing system at a 45-degree angle. It is commonly used in situations where a plumbing system needs to navigate a corner or to accommodate for limited space. The Street Elbow 45° is available in various materials, such as brass and PVC, and comes in different sizes to accommodate a range of pipe diameters, ensuring compatibility with various plumbing installations.