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Why are airplane toilets so loud?

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A normal toilet is a gravity toilet. It uses water pressure to draw the water through the drain pipe and into the sewer line. On an airplane, this configuration is impractical because of the motion of the aircraft. Therefore, airplanes use a powered vacuum to suck the contents out of the toilet. read more

A normal toilet is a gravity toilet. It uses water pressure to draw the water through the drain pipe and into the sewer line. On an airplane, this configuration is impractical because of the motion of the aircraft. Therefore, airplanes use a powered vacuum to suck the contents out of the toilet. These toilets are therefore known as vacuum toilets. read more

So think of your toilet as playing beautiful music taking all that waste out of your home and to wastewater treatment plant so it can be reused! If you are asking about a toilet on an airplane, they work differently. Instead of using water to make the toilet flush, they use a vacuum and that is why they are so loud. read more

When you flush, a trapdoor in the base of the toilet opens and Skykem fills the bowl. The loud roar you hear when you flush isn’t actually waste material exiting the plane into the atmosphere, despite the urban legends — it’s the vacuum sucking the contents out of the waterless bowl. read more

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