A hose coupling is a device used to connect two hoses together or to attach a hose to a piece of equipment. It allows for the easy transfer of fluids, such as water or chemicals, by creating a secure and leak-proof connection. Hose couplings come in various types, including threaded, quick-connect, and cam-lock, each designed for specific applications. These couplings are commonly used in industries like agriculture, construction, and firefighting. For example, in firefighting, hose couplings enable firefighters to quickly connect hoses to hydrants or other water sources. Proper selection and maintenance of hose couplings are essential for ensuring safety and efficiency in fluid transfer operations.