This compression waste reducer has a 1" 1/2 male thread and a 1" 1/4 female thread. By installing it in a flexible waste pipe with 1"" 1/2 thread, it is possible to couple the pipe to the 1"" 1/4 threaded valves. Two gaskets are included for perfect sealing. The reducer is made of high quality polypropylene that guarantees a perfect fit and durability.