Grooved reducers are utilized in piping systems and various industrial applications to connect pipes of different sizes. They are often referred to as "reducing couplings" because they reduce the pipe size from one end to the other. The grooves on the fittings refer to a specific type of connection method employed to securely join the pipes. Grooved reducers typically feature different diameters at each end, with the larger end being grooved.

These grooves enable the utilization of flexible couplings to connect the grooved reducer to the larger pipe, while the smaller end of the reducer is typically threaded or welded to a smaller pipe. The grooved connection employed in reducers is renowned for its ease of installation, reliability, and flexibility. The flexibility of the coupling allows for some movement between the pipes, helping to absorb shocks and vibrations and mitigating the risk of system damage. Grooved reducers find widespread application in HVAC piping systems, fire protection piping systems, and industrial piping systems.