CO₂ Cylinder Refills

Keep your sparkling water maker, drinks dispenser or other CO₂ equipment supplied with gas using CO₂ refill cylinders from GAS4U.

Our CO₂ refill cylinders provide a convenient way to replenish your gas supply without continually purchasing new cylinders. Whether you need a one-off refill or regularly use CO₂ at home, our CO₂ Refill Club makes keeping your cylinders topped up simple.

Know your connection type? Go straight to our Quick Connect CO₂ cylinders for click-in machines such as the SodaStream TERRA, ART and DUO, or our Screw-In CO₂ cylinders for most other sparkling water makers and taps. Looking for genuine SodaStream? See our SodaStream gas refills.


Shop CO₂ Refill Cylinders

GAS4U offers convenient CO₂ refill options for compatible cylinders, including 425g cylinders designed to make up to 60 litres of sparkling water.

Choose the right connection for your machine:

Screw-In CO₂ Refill Cylinder – 425g

Our 425g Screw-In CO₂ Gas Cylinder Refill is designed for compatible sparkling water makers and CO₂ systems that use a traditional screw-in cylinder.

Each cylinder can make up to 60 litres of sparkling water, depending on your carbonation level and usage.

If your machine uses a standard screw-in CO₂ cylinder, this is the refill option to choose.

Shop Screw-In CO₂ Refill Cylinders

Quick Connect CO₂ Refill Cylinder – 425g

For compatible machines using the Quick Connect system, our 425g Quick Connect CO₂ Gas Cylinder Refill provides a straightforward way to replenish your CO₂ supply.

Each cylinder can make up to 60 litres of sparkling water, making it a convenient choice for regular home use.

The Quick Connect cylinder is suitable for compatible machines including SodaStream TERRA, DUO and ART models.

Shop Quick Connect CO₂ Refill Cylinders


What Are CO₂ Refill Cylinders?

CO₂ refill cylinders are used to replenish the carbon dioxide supply in compatible equipment. For sparkling water makers, CO₂ is injected into water under pressure to create the fizz and carbonation you enjoy.

Once your cylinder is empty, you can have it refilled rather than replacing the entire cylinder with a new one.

At GAS4U, our CO₂ refill service gives you a convenient way to keep your cylinders in circulation while making regular CO₂ supplies easier to manage.


Join the GAS4U CO₂ Refill Club

If you regularly use CO₂, the GAS4U CO₂ Refill Club takes the hassle out of remembering to order your next refill.

The Club is designed for customers who need a regular supply of CO₂ refill cylinders. Instead of waiting until your cylinder is empty and placing a new order, you can set up a recurring supply and have your fresh cylinders dispatched when your renewal is due.

You'll receive a reminder email 10 days before your renewal, giving you time to prepare your empty cylinders for return.

How the CO₂ Refill Club Works

  1. Choose your refill option – Select the CO₂ refill cylinder that suits your equipment.

  2. Set up your subscription – Join the GAS4U CO₂ Refill Club for regular deliveries.

  3. Receive your reminder – GAS4U will email you 10 days before your renewal date.

  4. Receive your fresh cylinders – Your payment is processed on the renewal date and your fresh CO₂ cylinders are dispatched.

  5. Return your empty cylinders – Contact GAS4U to arrange collection of your empty cylinders within the return period.

  6. Keep your CO₂ supply going – Your next refill is taken care of, so you don't have to worry about running out.

With the CO₂ Refill Club, regular CO₂ users can make their cylinder refills more predictable and convenient.


Why Choose CO₂ Refill Cylinders from GAS4U?

Choosing a refill service can be a convenient alternative to continually buying new cylinders. GAS4U makes it straightforward to order the CO₂ you need and return your empty cylinders.

With GAS4U, you can:

  • Order CO₂ refill cylinders online

  • Choose between Screw-In and Quick Connect options

  • Get 425g cylinders capable of making up to 60 litres of sparkling water

  • Return empty cylinders through GAS4U's refill service

  • Receive credit for eligible returned cylinders

  • Join the CO₂ Refill Club for regular deliveries

  • Make your CO₂ supply easier to manage


Which CO₂ Refill Cylinder Do I Need?

The correct cylinder depends on the equipment you use. Before ordering, check whether your machine requires a Screw-In or Quick Connect cylinder.

Screw-In CO₂ Cylinders

Choose a Screw-In refill if your machine accepts a traditional screw-in CO₂ cylinder.

These cylinders are commonly used by older and compatible sparkling water makers and are fitted by screwing the cylinder into the machine.

Quick Connect CO₂ Cylinders

Choose a Quick Connect refill if your machine uses the Quick Connect connection system.

GAS4U's Quick Connect 425g refill is suitable for compatible SodaStream models including TERRA, DUO and ART.

If you're unsure which cylinder your machine requires, check the manufacturer's instructions or contact GAS4U before ordering.


CO₂ Refills for Sparkling Water Makers

CO₂ refill cylinders are an essential part of making sparkling water at home. A 425g cylinder can make up to 60 litres of sparkling water, although the actual amount will vary depending on how heavily you carbonate your drinks.

Instead of buying bottled sparkling water every time you want a fizzy drink, a compatible CO₂ cylinder allows you to carbonate water at home whenever you need it.

Keeping a spare refill cylinder available can also help ensure you never run out of CO₂ when you want sparkling water.


Make Your CO₂ Refills Easier with GAS4U

Whether you need a single CO₂ refill cylinder or regularly go through cylinders at home, GAS4U offers a simple way to manage your CO₂ supply.

Choose from 425g Screw-In or Quick Connect CO₂ refill cylinders, depending on your equipment, or join the GAS4U CO₂ Refill Club for a more convenient recurring refill service.

Order your CO₂ refill cylinder from GAS4U today.


Frequently Asked Questions

How long does a 425g CO₂ cylinder last?

A 425g CO₂ cylinder can make up to 60 litres of sparkling water. The actual amount you get from a cylinder depends on factors such as how often you carbonate and the level of carbonation you prefer.

What is the difference between Screw-In and Quick Connect CO₂ cylinders?

Screw-In cylinders are fitted by screwing them into a compatible machine. Quick Connect cylinders use a compatible Quick Connect connection instead. Always check which type your equipment requires before ordering.

Can I refill my empty CO₂ cylinder with GAS4U?

GAS4U offers a CO₂ cylinder refill service where eligible empty cylinders can be returned and credited towards future orders. This helps you keep your existing cylinder supply in circulation rather than continually purchasing replacements.

What is the GAS4U CO₂ Refill Club?

The GAS4U CO₂ Refill Club is a recurring refill service for customers who regularly use CO₂. Fresh cylinders are dispatched when your subscription renews, helping you maintain a regular CO₂ supply without having to remember to place every order manually.

When will I be reminded about my CO₂ refill?

GAS4U sends a reminder email 10 days before your subscription renewal, giving you time to prepare your empty cylinders and make arrangements for their return.

How many litres of sparkling water can a CO₂ refill cylinder make?

GAS4U's 425g CO₂ refill cylinders can make up to 60 litres of sparkling water. Actual output depends on your machine and how much carbonation you use.

Which CO₂ refill cylinder should I buy?

Check the connection on your machine before ordering. If it uses a traditional screw-in connection, choose the Screw-In CO₂ Refill Cylinder. If it uses a Quick Connect system, choose the Quick Connect CO₂ Refill Cylinder.

If you're unsure, contact GAS4U for advice before purchasing.


Complete your setup with spare carbonating bottles and SodaStream syrups.