1-1/2" flush PMC | 1/4 in. Male National Pipe Thread (MNPT) | Connector Block | G 1/2 B EN 837 | G 1/2 B x 1/2 in. Male National Pipe Thread (MNPT) with 1/4 in. Female National Pipe Thread (FNPT) | MIP Threaded | MNPT x Push-to-Connect | Spigot x Socket Weld | Spigot x Threaded | Threaded MIP | Threaded True Union