This short instructable will show you how to make a carbonating tank. This is useful if you want to make your own soda, maybe you like fizzy coffee, or making fizzy fruit. The principle is simple. Water can absorb carbon dioxide (CO2) if they are both pressurized together. The colder the water (ice is not water, so not freezing temperatures) the more CO2 it will absorb. When the pressure is released the CO2 will start to escape from the water and creates a fizzing action just like your favorite bottle of root beer (it's Virgils...only try it if you're willing to be addicted).
Our DIY carbonator is going to be very simple. We just need a tank to store our carbonating target that is capable of being pressurized to about 100 PSI. Rich Faulhaber over at Evil Mad Scientist Labs was nice enough to share the idea of using a water filter housing. Check out www.evilmadscientist.com/article.php/co2inator
to see how he did it. Follow on to the next steps to see my take on it.