NASA’s Artemis II lunar mission is testing a cutting-edge space toilet, part of the Universal Waste Management System (UWMS), designed to support crews on long-duration deep-space missions.
Developed by Collins Aerospace under a contract dating back to 2015, the UWMS prioritizes efficiency, reliability, and unisex usability for missions lasting up to 21 days.
NASA awarded Collins Aerospace a $23 million fixed-price contract to design, demonstrate on the ISS, and integrate the system into the Orion spacecraft.
The Artemis space toilet addresses problems faced by previous systems, such as leakage, bulky design, and male-centric configurations.
UWMS has reduced volume by 65% to 5 cubic feet and weight by 40%, enabling three units to serve up to 11 crew members.
During the Artemis II launch on April 1, the UWMS experienced minor glitches, including a frozen vent that temporarily required backup urine bags.
Mission specialist Christina Koch described the issue during a BBC video link on Thursday.
“I’m proud to call myself the space plumber. I like to say that it is probably the most important piece of equipment on board,” Koch said.
The UWMS features include:
- A metallic seat with an openable lid.
- Adjacent unisex funnel/hose for urine collection.
- Handholds and foot restraints to secure astronauts in zero gravity.
- Automatic airflow that activates upon lid lift to prevent spills.
- Replaceable canisters for solid waste in sealed, odor-filtered bags.
- Corrosion-resistant titanium construction.
- Blue acoustic foam that muffles noise below 68 dBA and EMI-compliant electronics.
- Sliding doors and optional privacy curtains.
The system accommodates the 95th percentile of male and female body sizes and supports simultaneous urine and fecal collection.
Improved airflow dynamics and HEPA-filtered fecal bags prevent floating waste, while urine pretreatment eliminates the need for chemicals on short-duration missions.
“Despite minor glitches, the UWMS is operating nominally midway to the Moon and has proven reliable for deep-space operations,” NASA reported.
The Artemis space toilet represents a major advancement over previous ISS systems and Apollo-era bags, offering enhanced privacy, reduced maintenance, and improved efficiency for astronauts on extended lunar missions.
