Is your Sodastream blowing CO2 when not in use? Something might be loose. Here’s why.

Ever since their invention, Sodastreams have become the standard to carbonating drinks at home. It’s amazing the number of possibilities these appliances opens up to those who own them.

Do you want a cola? Sure! Do you want a fizzy glass of orange juice? No problem. There is virtually nothing you can’t accomplish with these machines.

That being said, while they are truly incredible, these units are not flawless. If you’re here reading this, yours is blowing CO2 when it’s not in use.

What can you do about it?

There are many possible explanations for your CO2 leaking problem. From improper assembly to a loose gas canister. The possibilities are nearly endless.

In order to properly troubleshoot your soda steamer, you need to have a clear idea of what you’re looking for, but the research is so tedious!

Relax. I have already taken care of it for you.

Below, you will find a list of the most common causes behind this occurrence and the simplest steps you can take to address them. Rest assured that, if you follow them to a tee, your appliance will be back to normal in the blink of an eye.

Are you ready? Let’s dive in!

Fixing a Leaky Sodastream

While these appliances do not seem extremely complicated, assembling them properly can be more difficult than you think. You’d be surprised at how many people experience this problem every year, only to find that the source of it was improper component positioning.

Your Sodastream might be blowing CO2 while not in use due to:

  • Improper assembly
  • A loose gas tube
  • A loose canister
  • A faulty canister

As I stated above, in most cases, addressing these issues will take care of the leaking, but if it doesn’t, I’ll also cover some scenarios where you should start thinking about calling a professional.

#1 Improper Assembly

closeup of sodastream assembly
Make sure that everything is assembled correctly before operating your Sodastream

The first thing I want us to look at is the way in which you reassemble your Sodastream after cleaning. You’d be surprised at how many times the CO2 leak is actually due to a part that was not put back together properly.

Even if your appliance is brand new, chances are that your manufacturer might have botched the job. This is obviously not awfully common, but it’s always a possibility.

Before looking into a loose gas tube or something broke inside your unit, it’s important to rule out this external factor.

Solution: If you just cleaned your appliance or disassembled it for whatever reason, I’m sorry to tell you that you’re going to have to do it again.

I know, bummer.

After doing this, make sure to put everything back together properly and tightly. It might sound ridiculous, but you could make a checklist to guarantee that everything is where it’s supposed to be. It has worked wonders for me.

#2 A Loose Gas Tube

Provided that you already reassembled your Sodastream perfectly, we can look at the possibility of a loose gas tube.

As you know, this little part is solely responsible for transporting the CO2 in your canister, to the external section of the tube, where carbonation occurs. Depending on where the damage is, this could explain why your Sodastream is leaking this gas.

If the tube is broken a little higher, you might not even be able to carbonate your beverages, as the gas could be escaping before reaching the bottle-end of the tube.

Solution: The best way to check for damage, is to go inside your appliance.

To do so, please follow these steps:

  1. Locate the screws next to the external hose, near the CO2 dispenser
  2. Undo them with a screwdriver
  3. Remove the outer plastic panel and expose the unit’s internal components
  4. Locate the gas tube, and start to carefully remove it
  5. After it’s been completely removed, clamp one end with pliers, and put running water through the other

If you notice any bubbles along the tube, you have a damaged part, and it needs replacing. Your user manual should have instructions regarding how to properly replace your gas tube, so be sure to read it again to find them.

Getting a new gas tube shouldn’t be too difficult, as you can find great replacements at any online marketplace, or directly from your manufacturer.

#3 A Loose Canister

sodastream machine with bottle
Inspect the position of your CO2 canister before use

If you’re anything like me, you use your Sodastream every day to prepare several beverages, which means that you probably have to replace your CO2 canister very often.

At this point, you’re probably an expert in this process, but remember, it isn’t until we get confident, that we make our first mistakes.

While you might have the entire procedure down and could probably perform it blindfolded, there will always be the possibility of improper placement.

If you recently replaced your canister and your Sodastream is blowing CO2 when not in use, you might want to reopen the compartment and take a look at how the tank is positioned.

Solution: More often than not, double-checking the good old “righty-tight”, “lefty-loosey” will take care of the problem.

Who knows? This might be the only issue with your appliance, and you just fixed it, for free.

Oh! And if you’re the proud owner of a new Sodastream, and are not very familiar with how they work, or how you can go about replacing your canister, there are tons of online videos that you can check out and follow along step by step.

#4 A Faulty Canister

Provided that you are, in fact, the master of canister replacement, it’s not too crazy to think that the tank itself could be faulty.

As you know, while most modern factories operate under extremely high-quality standards, there will always be an allowed margin of error, which means that some damaged canisters can make it into the market inadvertently.

If you happen to be the unlucky owner of one of these, it would explain why everything else might seem perfectly fine, but your Sodastream is still blowing CO2 when not in use.

Solution: Fixing this should not be too complicated. Manufacturers are well aware of the existence of these canisters, so if you happen to end up with one, all you have to do is give them a call, and they will most certainly give you another one for free.

That being said, be very careful when handling these gas tanks. Remember that they are highly pressurized, so if removed improperly, they could explode, and hurt you.

When Should You Call a Professional?

The answer to this question will depend greatly on your warranty status and how confident you feel about doing your own repairs.

If you’re still under coverage, you can send your appliance to your manufacturer for repairs. They usually take care of them for free, unless specified otherwise in your document.

On the other hand, if you’re no longer under coverage, and do not wish to wait several weeks for them to return the repaired unit, you can always try and fix it yourself.

As I said before, it’s all a matter of DIY-savvy and personal preference.


A Sodastream that keeps blowing CO2, even when it’s not in use, can be a nightmare. Not only is it extremely annoying, but you’re also running through canisters at a staggering speed.

Luckily, there are very simple ways to fix this. As you’ve learned in this article, more often than not, the reasons behind this are more closely related to your user habits, or a simple mistake, than an actual technical fault with the unit itself. 

And even when one or more components are, in fact, damaged, replacing them is normally not very expensive or difficult.

That being said, if during any part of the DIY process you feel unsafe or doubtful, please do not hesitate to call a technician. I commend you for trying to do your own repairs, but never at your wellbeing’s expense.

You can still learn by watching the professionals work.

Thank you for sticking with me all the way to the end. If you found this article useful, why not keep the learning going through our other incredible resources below?

Enjoy the sodas!