Laura and I drink a lot of seltzer, and I began to feel bad about bringing so many plastic bottles into the world. Since I completed the carbonator (I just call it The Device), I haven’t bought a single bottle.

Assembling the device was fairly easy. I work with engineers, and was lucky to have their council, but it’s a simple process. This great website, Truetex.com, has exhaustive information about building a carbonating machine, and supplied me with everything I needed to know to go about building my own. All it takes is a tank, a regulator, some fittings, hose, and some way of connecting the hose to the bottle. I bought a used tank and new regulator off ebay, and a handy tube-and-cap system from an online home brewing company. Assembly pretty much just involved screwing the fittings together, and then bringing the tank to a local welding supply store to be filled with CO2. Top to bottom, I probably spent $60. That website has a ton of information, and I’ll also be happy to give you any more specific advice I can about the carbonating machine.
A few tips:
Pipe sizes are not necessarily standard. One company’s 1/4″ pipe might not agree with another company’s 1/4″ pipe. It’s best to try and get all the fittings from the same place, and don’t hesitate to bring pieces to a store to make sure what you’re buying will fit.
Cold water is necessary when carbonating. I just keep a few bottles of flat water in the fridge, so when I want seltzer the water’s already cold.
When carbonating, shaking the bottle with great vigor is key. You’ll get better results from a brief violent shaking than a prolonged gentle shaking.
Additionally, I’ve been working out a recipe for ginger ale. Here’s my best shot to date:
1/2 cup chopped peeled ginger root, plus
1 very small knob peeled ginger (for grating)
1 1/2 cups water
1/2 cup sugar
4 planks lemon peel (I just use a vegetable peeler)
pinch salt
Place chopped ginger, water, lemon peel, and salt in saucepan and bring to a boil. Turn down to medium and simmer for 10-15 minutes. Add sugar, bring back to a simmer, stirring occasionally. Strain liquid, pressing on solids with spoon to extract as much liquid as possible. Grate approximately 1/4 teaspoon of the ginger knob into the liquid and stir well to combine. Cool.
To make ginger ale:
Mix 1 part syrup and 2-3 parts seltzer (to taste) over ice. I like to squeeze in a lime wedge. Another fine addition: dark rum.
Enjoy!