Unions | 3/4in | Buttweld | Male National Pipe Thread (MNPT) | Sweat | Threaded x Threaded | Threaded | 1-1/2" | 1-1/4" x 1-1/4" | 1-1/4" x 1-1/4" x 3/4" | 3/4" x 1/8" | 4" x 1-1/2"