You just can't make this stuff up. According to the National Journal, something exploded and the press room was soon inundated by liquid matter.
Something suddenly broke in the piping of the third-floor urinal, and water began spewing from beneath the men's room door. As the water flowed, it first surrounded the Associated Press's working area, then spread toward both ends of the gallery, which was occupied by fewer than usual reporters and staffers, because the House is out of session until Tuesday.
There was a huge escape, and "employees from the Architect of the Capitol and other Capitol staffers managed to eventually stop the geyser." Then vacuums came to "suck up the water, and a section of the gallery carpeting was taken up – leaving behind a sticky floor."
Nothing of this surprises me. This sounds exactly how I imagine things are in that building every day: lots of liquid, overflowing, wet press, vacuum sucking and sticky floors. [National Journal via Wonkette]