Hi all! I'd like to remove my salt water chlorinator cell to have it rebuilt, but I'd still like to run my pool pump. I have an old Jandy AquaPure 700 cell that is square shaped (unlike the current rounded cells) and the color of the ends are black (as opposed to some that are white). Would anyone know what kind of part I would need to purchase to thread into the existing union caps, so I can build my own replacement pipe? Thank you!