1-1/2" flush PMC | 1/4 in. Male National Pipe Thread (MNPT) | 9/16-18 UNF 2B high pressure | G 1/2 B x 1/2 in. Male National Pipe Thread (MNPT) with 1/4 in. Female National Pipe Thread (FNPT) | MNPT x Push-to-Connect | Spigot x FIP | Threaded MIP | Threaded x Threaded