Answering this question is not that challenging, actually it is very simple. However, some people are interested to know. So, what happens? Where does it go? Does it fall down on earth or what? Well, let’s keep reading.

During a flight, you start to feel like using the rest room. You enter a very small room, where you can find the wash basin, toilet and some paper napkins. As I’ve mentioned, the room is quite small, hence some people can have a problem getting inside. Speaking from personal experience, it is not that comfortable. But the restroom is not a big deal, as long as you’re enjoying the flight waiting to reach your destination.

Anyway, you go to the toilet, mission accomplished, and then flush. You hear a very loud noise and then it disappears. Now, where does it go? There are some people that think that it falls down on earth, turning into ice mid-fall, and then suddenly appear on the surface. Well, hate to be the bearer of bad news but that’s not true.

The process relies on mechanics and physics. When you flush, you’re applying pressure, moving the liquid through a pipe. It continues till it reaches a cistern, that is placed further back, in the plane. The surface of the pipe is similar to a teflon pan, so it can move easily. When the aircraft lands, this cistern is then cleaned.

What about the water? Obviously, you can’t find drinking water on board, except in bottles, and that can’t be used for flushing and washing your hands. Water is heavy, and weight is important during take off and landing. Therfore, the water used is made from a chemical liquid that turns into water. of course, still it’s still not for drinking, thus, please do not drink the water from the wash basin. The liquid used is not heavy and enough is created to accommodate everyone on board.

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