Where does the water from an airplane's toilet go?

Answer 1

Into the coffee system, which helps to give airline coffee its unique taste and aroma.

Really? There's a 100-gallon tank in the back of the plane that all the waste from the toilets is sucked into. Ground crews pump it out while the plane is being readied for its next flight, and the waste is then taken to a machine that feeds it into the city sewage system at a rate that won't clog the pipes.

Answer 2

All aircraft toilets are connected to internal holding tanks. All the toilets are 'macerators' which totally liquidise all product fed into them so no solids are in these tanks. These are vacuumed out after each flight

Answer 3

It has traditionally just been dumped in flight. However most countries now have laws requiring a waste water holding tank on airliners.

Answer 4

It is saved to a tank on board until landing where the tank is then pumped out.