Mission control confirms ‘toilet go for use’ after glitch sorted
The $23 Million Space Plumber’s Nightmare: Why Artemis II’s Toilet Became NASA’s Biggest Headache
As the four astronauts of NASA’s Artemis II mission hurtle toward the Moon, they are making history as the first humans to leave Earth’s orbit in over 50 years. But while the Orion capsule’s navigation and life support systems have performed admirably, one critical piece of infrastructure has turned into an unexpected saga of burnt smells, frozen urine, and emergency plastic bags.
Meet the $23 million (approximately £17.4 million) "Universal Waste Management System" (UWMS) the most expensive and troublesome toilet in history .
Since launching from the Kennedy Space Center on April 1, the crew has been battling a series of plumbing failures that have forced them to rely on "collapsible contingency urinals," essentially high-tech juice boxes for human waste. What was supposed to be a step up from the crude Apollo-era bags has become a stark reminder that in space, gravity isn't the only thing you can't take for granted.
A Fault from the Start
The trouble began almost immediately. Shortly after the Orion capsule reached orbit, the toilet’s sensors threw up unexpected readings. Mission specialist Christina Koch who has since proudly dubbed herself the "space plumber" had to get her hands dirty within the first 48 hours.
The initial diagnosis was a "priming" issue. The system, which relies on airflow rather than gravity to guide waste away, wasn't wet enough to start the pump. "Once we figured out that we didn’t put enough water in, we put more in there, made sure that it was essentially primed... and then the toilet came right back up," Judd Frieling, the ascent flight director, explained .
But just as Mission Control declared "toilet is go for use," the relief was short-lived. The crew soon reported a bizarre and unsettling symptom: the smell of something burning .
The 'Burnt Heater' Mystery
For the astronauts living in a cramped capsule the size of a camper van, a strange odor is more than a nuisance it is a potential safety hazard. Canadian astronaut Jeremy Hansen described the smell as distinctly chemical.
"To me, it was a burnt smell," Hansen told mission control. "It was definitely in the hygiene bay area" .
Christina Koch described it as "that burnt heater smell," similar to what you might experience turning on a dusty radiator for the first time in winter. Engineers initially suspected the orange thermal insulation material surrounding the toilet compartment might be off-gassing due to the heat of the vacuum pump. However, while the "burnt toast" aroma was unsettling, NASA concluded it posed no immediate danger to the crew.
But the olfactory offense was merely a distraction from the real mechanical crisis brewing behind the door.
The Freeze-Dried Blockage
The most critical failure involves the physics of space itself. Unlike the International Space Station (ISS), which recycles urine into drinking water, the Artemis II mission is a shorter, 10-day flight. Consequently, the Orion toilet is designed to dump wastewater directly into the vacuum of space .
This is where the trouble began. On Saturday, the system failed to dump its waste overboard. The culprit? A blockage caused by frozen urine.
In the frigid vacuum of space, the vent line likely iced over, creating a plug that prevented the tank from emptying. As the urine tank filled up (it is roughly the size of an office trash can), the risk of a messy overflow increased .
NASA engineers got creative. They ordered the crew to reorient the entire Orion spacecraft, pointing the frozen vent nozzle directly toward the Sun. For several hours, the capsule "baked" the blockage in an attempt to melt the ice.
The solar bake worked partially. The crew managed to dump about half of the tank’s contents into space, but a stubborn clog remained. "The wastewater tank is not full and the toilet is operational; however, the crew was instructed to use backup collection devices overnight if needed," NASA stated over the weekend .
Back to the Bags
For the crew of Artemis II Reid Wiseman, Victor Glover, Christina Koch, and Jeremy Hansen this means going analog. When the high-tech, 3D-printed titanium toilet fails, they revert to the "Collapsible Contingency Urinal" (CCU).
NASA astronaut Don Pettit shared details of the backup system on social media, describing the device as an open container that uses capillary action to control fluid, preventing droplets from floating around the cabin. "When you are in cislunar space and the toilet breaks, you need contingencies," Pettit wrote, noting that the bags replace the need for heavy diapers.
While the crew is still "go" for bowel movements (which are vacuum-sealed into individual bags), the urine situation remains a fluid situation.
Why Is This So Hard?
It is easy to mock a $23 million toilet that freezes up, but the physics of microgravity make waste management genuinely terrifying. In space, urine doesn't fall; it floats. If the airflow fails, surface tension causes droplets to cling to walls, equipment, and astronauts.
NASA Administrator Jared Isaacman acknowledged the difficulty on Sunday. "We can do a lot of extraordinary things in space right now," he told CNN, "but nailing this capability is one that we need to certainly work on".
Despite the plumbing drama, the mission remains on track. The astronauts are scheduled to fly past the Moon on April 6. As they travel deeper into space than any humans before them, they are carrying a reminder that even with billions of dollars of technology, sometimes you just need a plastic bag and a roll of tape.
For now, the "space plumber" is on call, and the crew is hoping the Sun continues to melt their frozen troubles away before the next bathroom break.