3 DIY Ways to Refill Your SodaStream Soda Maker

If you drink a lot of carbonated water in your home, you will find that a SodaStream fountain will pay for itself and a pair of tanks quickly. Since it costs about 25 cents per liter of carbonated water, it is a lot more affordable than seltzer from the supermarket. Plus, think about all the environmental costs that go into making glass and plastic bottles and then shipping them.

While a SodaStream machine has a lot of great benefits, one drawback is the tank refills. Having to pay for CO2 can be annoying along with the tank exchange. Thanks to a lot of creativity out there in the world, there are now DIY fixes that will ensure you don’t have to pay for or go to the store a new CO2 tank every again.

Since a refill canister can cost up to $20, it can get a little expensive to make your own carbonated beverages. Not to mention difficult if you don’t live near a store that carries the canisters. That’s why it’s easier and more affordable to use one of the modifications below that allows you to use a larger tank.

Luckily there are adapters that can be used to attach regular CO2 tanks to your SodaStream machine. You can save a significant portion of the costs of refilling your SodaStream machine by refilling your CO2 tanks at a homebrew store that provides cheap and food grade CO2. This method includes a high upfront cost as you need to buy a CO2 tank as well as an adapter but over time you’ll surely recoup the costs.  It also involves less work as you simply need to go to the homebrew store to refill your tank once in a while after you’ve setup the system. Since these CO2 tanks can be quite big and carry multiple times the amount of CO2 contained in SodaStream carbonators, you’ll also have to make even less trips to get the tank refilled.

1. External Tank Adapter

If you choose to use an adapter and a hose modification, you will need to buy a kit that includes the hose, adapter, and a pressure gauge along with a 20-pound non-siphon CO2 tank. After that, simply drill an opening into the back of the SodaStream tower that is large enough to fit the smallest fitting in your line. If needed use a chisel to make the hole larger and clean it up since sharp edge couple potentially cut your CO2 line.

Next, just screw on the line on the SodaStream side and then thread it and the quick-attach fitting into the hole you made. After putting your SodaStream back together, you can add the gauge, plastic washer, and fitting onto the CO2 tank by following the instructions that come with the adapter kit.

Now all you have to do it attach the line to the gauge, and you are finished. While the hose and tank are pretty visible in your kitchen, which not everyone cares for, it is a great money saver and saves you a lot of time from running to the store to swap out tanks. Check out the video below to see how one of these kits work.


2. Refill Adapter

Refill adapters work with a wide range of CO2 bottles. When you are saving money using a larger tank of paintball canister, the adapters are an important part of the modification. Typically, they feature all-metal construction that is durable and stable.

This CO2 cylinder refill connector is a handy accessory to have if you own a SodaStream machine. Easy to screw on, these adapters allow you to fill CO2 cartridges on your own by making it an extension of your SodaStream machine. Part of a cost-effective modification, using a refill adapter making exchanging out CO2 cylinders unnecessary and saves you money.

You only need three things to make this modification. A connector, a SodaStream machine, and a CO2 tank. If you can’t find one lying around or from a friend, you can purchase them on Amazon for about $60, but keep in mind that this is the only tank you will need to purchase in the future. Plus, if you buy a 20-pound tank, you get the equivalent of CO2 from 22 small internal tanks. Keep in mind if you buy the largest tank you can afford, you will end up saving a lot of money in the long run.

Once you have acquired all the parts, you can start to put them together. First, take off the top of the tank and place it upside down on the container allowing you to see the small threaded port where you would typically screw on the smaller canister. Screw the large end of your tank on until it’s on tight, but not so tight that you cause a crack in the plastic thread. This should be a simple process that requires no physical modifications to your SodaStream device, which will void its warranty.

Next, thread the tank’s cord through the SodaStream’s body before turning it right side up so it can get ready to produce soda. Lastly, take the end of the tank that has the pressure gauge and connect it to the CO2 tank. Do not forget to place the plastic washer in between the brass fitting and the tank to act as a seal in between these two metal pieces, which will prevent you from losing CO2. Once it is connected, all you need to do is open up the valve on the tank’s top and attach and your SodaStream bottle and use it as normal.

By using this method, you won’t have to worry about spending a lot of money or running out of CO2 quickly. You can even install this modified device into your countertop so that the canister and hose are hidden. Check out the video below to see how this modification works.


3. Paintball/SodaMod Tank Adapter

Another way to save some money with your CO2 canisters is to use a paintball tank with your SodaStream machine. Not only will this help save you money, but you won’t have to have tubing running from the back or have an external tank nearby. The only thing that might be an issue is finding out where to have the paintball tanks refilled.

When refilling your paintball tanks, the first place on your list to call should be a sporting goods shop. Paintball shops are also an obvious choice, but they may not be as numerous as you think. If you still aren’t having any luck, also try a dive shop, home-brew stores, or a welding shop.

The tanks can be purchased off Amazon and the adapters should be an easy find online. These little brass adapters come with a little adjustable set screw that you may need to tweak to make sure the air is flowing. Make sure whatever adapter you purchase it is stainless steel of lead-free brass, and it doesn’t hurt for it to indicate “food grade.”

Also, look for the largest tank that you can find to fit in your carbonator. This can vary depending on the manufacturer and will range between 24 and 9 ounces. Check out this video to see how paintball tanks can be used as a part of a modification.


By using any of these modifications, you may have to spend a little money up front, but the savings on the back end will more than makeup for it. Not only is this a cost-saving modification, but it also saves you a ton of time from running to the store to swap out tanks. This is the perfect solution for anyone that loves fizzy drinks and loves a good DIY project.