How do toilets in aeroplanes work with vacuum?

Airplane toilets use an active vacuum instead of a passive siphon, and they are therefore called vacuum toilets. When you flush, it opens a valve in the sewer line, and the vacuum in the line sucks the contents out of the bowl and into a tank. read more

Airplane toilets are what are called Vacuum toilets which are similar to normal toilets but use a vacuum instead of water to flush down the waste. Water toilets are not used on airplanes mainly because the water in toilet bowl can spill during turbulence and cause a mess. read more

First installed by Boeing in 1982, vacuum toilets rely on strong suction and slick walls to pull waste away using just a fraction of a gallon of water. Pressing the flush button opens a valve in the bottom of the bowl, exposing the contents to a pneumatic vacuum. read more