Image: Space toilet
NASA
Astronauts say the toilet facilities in the international space station's Destiny module, shown here in a photo taken after its installation, are on the fritz. That leaves one working toilet on the space station, plus another one on the shuttle Endeavour.
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updated 7/19/2009 8:28:38 PM ET 2009-07-20T00:28:38

The bathroom lines at the already crowded space shuttle and space station complex got a lot longer Sunday because of a flooded toilet.

One of two commodes aboard the international space station broke down, right in the middle of complicated robotic work being conducted by the two crews. The pump separator apparently flooded.

Mission Control advised the astronauts to hang an "out of service" sign on the toilet until it could be fixed. In the meantime, the six space station residents had to get in line to use their one good toilet. And Endeavour's seven astronauts were restricted to the shuttle bathroom.

There have never been so many people — 13 — together in space.

The toilet repair work fell to Belgian Frank De Winne and American Michael Barratt, who had to don goggles, gloves and masks. They ripped apart the compartment, working well into the evening. Mission Control finally instructed them to call it a day and resume the effort Monday morning.

Flight director Brian Smith declined to speculate whether overuse caused the toilet trouble.

"We don't yet know the extent of the problem," Smith told reporters. "It may turn out to be of no consequence at all. It could turn out to be significant. It's too early to tell right now."

Plan B for potty breaks?
Teams of specialists in Houston and Moscow hurriedly convened to discuss the problem. The Russian-built, multimillion-dollar toilet flew up on a shuttle last November.

Video: Follow the shuttle Endeavour

Smith said there is no urgency to the bathroom situation, at least for now. But he said if the toilet remains out of action for several days, "then we'll readdress the situation and see what we have to do."

Going into this mission, NASA wanted at least four of Endeavour's crew to use the space station's bathrooms, so the shuttle waste water tank would not fill up.

As long as Endeavour is docked to the space station, it cannot eject any waste water. The nozzle is located near the newly installed porch on the Japanese lab; the attach mechanisms for experiments could corrode if sprayed by water.

Two bathrooms ultimately are needed for a full station crew of six. Smith said he did not know how long six occupants could rely on a single toilet.

Both the shuttle and station are equipped with other ways for the astronauts to relieve themselves, Smith said, including Apollo-era urine collection bags.

Moving day
Much of Sunday — the eve of the 40th anniversary of man's first moon landing — was spent using a pair of robot arms to move a large cargo carrier, loaded with batteries and spare parts, from the shuttle to the station. It was a relatively quiet day sandwiched between spacewalks.

Space Shuttle
AP
This image provided by NASA shows the chipped underside of the crew cabin near the nose cap of the space shuttle Endeavour, as seen from the international space station.

The 13-by-8-foot (3.9-by-2.4-meter) platform holds an antenna, pump and engine for the station's rail car, all of which will be removed and secured to the space station during a spacewalk Monday. NASA wants to store as many big spare parts as possible at the space station, before shuttles stop flying at the end of next year.

Also on the carrier are six batteries that will be plugged into the station by spacewalking astronauts later in the week, replacing old batteries.

In all, five spacewalks are planned during Endeavour's 1½-week space station visit.

As for the Apollo 11 anniversary, Smith noted that the Mercury, Gemini and Apollo programs contributed to today's international space station. He observed that he wasn't born when Neil Armstrong and Buzz Aldrin walked on the moon July 20, 1969; neither were two of the 13 spacefarers.

© 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Video: Is there a plumber on board? ISS toilet broken

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