What type of fitting is a coupling?

A coupling is a type of fitting specifically designed to connect two pieces of piping or tubing made from the same material. This function is essential in various plumbing and piping systems, ensuring that the flow of water or other fluids continues uninterrupted. Couplings allow for the extension of pipe lengths and can facilitate the repair of piping by joining two sections together.

By serving as a straightforward method of joining pipes, couplings help maintain the integrity of fluid systems, which is crucial for preventing leaks and ensuring efficiency. While couplings can be used in high-pressure systems, their primary purpose is not limited to that context, and they are not uniquely designed for high-pressure applications. Therefore, it's important to understand that their main role is the connection between two segments of the same material rather than altering the direction of flow or sealing leaks, which involve different types of fittings and components.