The ammiox is a valve on Leviathan biomechanoids that offers manual control over the flow of amnexus fluids. It has the appearance of a large boulder, and will release streams of orange and green steam when opened.
Though the crew seldom needs to use the ammiox, it is occasionally vital. A pregnant Leviathan may experience a blockage of amnexus fluid that can only be counteracted by moving the ammiox. When Moya was pregnant with Talyn, Ka D'Argo and John Crichton were forced to perform this task.
The ammiox is seen in an episode of the first season of Farscape.