Multipurpose hose fittings and couplings are parts that connect multipurpose hoses together in a pipe system. They are often used to link hoses that have different thread types or sizes. Multipurpose reusable hose fittings screw onto hoses and can be unscrewed and used again. Multipurpose barbed hose fittings have raised ridges that grip the insides of hoses to hold them firmly in place. Multipurpose hose couplings are typically used to temporarily connect two hoses together and lock in place without using tools. These fittings and couplings are used to create hose assemblies to convey air, water, or chemicals in a wide variety of applications.