The operation of a vacuum coffee maker is a unique process by combining vapor pressure and vacuum to brew some great coffee.
A vacuum coffee maker has 6 basic component's
* upper pot
* lower pot
* filter
* rubber gasket
* stand
* glass tube
You add your coffee to the upper pot of of your vacuum coffee maker and the water to the bottom pot. You then put the bottom pot on a heating element of some sort (stove top in many cases) Before the water reaches a boil add the top pot to the unit and seal it.
Now as the water boils in the bottom pot of the vacuum coffee maker it creates pressure that causes the steam to push the water up the glass tube into the upper pot starting the brewing process. The brewing time is a personal preference some like stronger coffee then others but 3-4 minutes of brewing time is ideal.
Then you remove your vacuum coffee maker from your heat source and let it cool down. As it cools down it creates a vacuum effect in the lower pot sucking the water through the filter and back down the glass tube into the lower pot.
Separate the bottom pot and use it to serve your coffee and enjoy.