An extension nipple, also known as a pipe nipple, is a metal fitting that is used to connect two plumbing fixtures. Nipple extensions feature a threaded exterior at one end and have internal threads towards the other end, and are generally used to bridge the distance between two plumbing fixtures in cases where the standard pipe or fitting may not be long enough. Available in a range of lengths and diameters for varied applications, nipple extensions can also be used to connect internal elbow joints to a faucet or tap. The extension nipple ensures a secure and leak-free connection between different components in plumbing systems, contributing to overall efficiency and reliability.