Question

Which type of toilet is used in aeroplanes

Answer 1

• 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

• Because the vacuum does all the work, it takes very little water (or the blue sanitizing liquid used in airplanes) to clean the bowl for the next person.
• Most vacuum systems flush with just half a gallon (2 liters) of fluid or less, compared to 1.6 gallons (6 liters) for a water-saving toilet and up to 5 gallons (19 liters) for an older toilet.

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some terms may not familiar to you

passive siphon, ; A bent pipe or tube with one end lower than the other,

A "water linee or sewer line " usually refers to a pipe supplying pressurized water ready for use while a sewer linerefers a pipe carrying water with human waste at atmospheric pressure.