Galvanized | Male National Pipe Thread (MNPT) | Socket Weld x Threaded | Sweat x MIP | Sweat | Threaded x Threaded | Threaded | 1-1/4" x 1-1/4" | 2-1/2" x 1-1/2" | 3" | 4" x 1-1/2" | 4" x 3-1/2"