Conpression | Male National Pipe Thread (MNPT) | Socket Weld x Threaded | Sweat x MIP | Threaded x Threaded | Threaded | 1-1/2" x 3/4" | 1-1/4" x 1-1/4" | 1-1/4" x 3/8" | 3" x 2" | 4"