Plumbers in Space.

And you thought being an astronaut was all Buck Rogers. Better be the best plumber there is if you want to get in according to this internal NASA HQ release :

All electric current readings for the water pump with the newly installed rotor were 'as expected for a normal operating pump', both without and with water flowing through it. No leaks were found. This unprecedented level of on-orbit repair on an EMU, a pioneering feat that finally regained cooling after over a year (!), is an important milestone: Its 'lessons learned' greatly advance engineers' understanding of how these spacesuits operate after being in zero-G over extended periods, and that clearly impacts our preparation for future long duration space missions.