Compression Coupling | Hex Reducer Bushing | Hex Reducer Bushings | Insert Coupling | MIP x NST (NH) Adapter | Reducer Coupilng | DWV | 1-1/2" | 1/2" x 3/8" | 2-1/2" x 2" | 3" x 1" | 3" x 1-1/2" | 5" x 3"