Coupling | Compression Coupling | Hex Pipe Locknuts | Hex Reducer Bushing | Insert Barb x MIP | MIP x NST (NH) Adapter | Reducer Coupling | 1-1/2" | 1" x 1/2" | 2" x 2-1/2" | 3/8" x 1/4" | 3/8" x 1/8"