425gScrew-in
SodaStream-style screw-in refill
Screw-thread fitting for compatible sparkling water makers.
£5.42per refill + VATDetails →
CO2 for SodaStream: choose the cylinder, then the refill
A sparkling water maker needs food-grade carbon dioxide and a cylinder with the correct fitting. Start with the bottle already in your machine: check its valve, capacity and the appliance instructions. A small cylinder that fits one system may not fit another, even when both contain the same CO2 gas.
For a SodaStream CO2 cylinder replacement, our range includes screw-in cylinders and refills and pink Quick Connect cylinders and refills. The product cards above link to the fitting details and separate choices for a refill or a new, filled bottle. We also list dedicated Quooker-compatible and Grohe Blue options for sparkling water taps.
| Range | Choose it for | Check before ordering |
|---|---|---|
| 425g screw-in | A compatible screw-thread sparkling water maker | The cylinder thread and your machine instructions |
| 425g Quick Connect | A compatible pink quick-connect system | The valve type, rather than the brand name alone |
| Quooker / Grohe Blue | The matching sparkling water tap system | The specific product’s fitting and capacity |
| 3.15kg / 6.35kg dip or siphon | Equipment designed for liquid CO2 supply | Liquid draw-off requirements and suitable professional filling equipment |
SodaStream CO2 cylinders: screw-in or Quick Connect?
The screw-in cylinder has a threaded connection. The pink Quick Connect cylinder uses a different fitting. These two connections are not interchangeable, so do not order a gas cylinder by colour or capacity alone. Compare your existing valve with the product photographs and check the machine’s instructions.
Our quick-connect product page covers compatible SodaStream machines including Terra, Duo and Art. For a machine with a screw-thread connection, start with the screw-in product details. If you cannot identify the fitting, contact Adams Gas with your machine model and cylinder details before buying.
Adams Gas supplies an independent refill service and unbranded compatible cylinders for UK customers. To check the original machine requirements, consult the SodaStream UK cylinder fitting guide alongside our product details. Product names identify the systems they fit; they do not mean that Adams Gas is the machine manufacturer. Follow your appliance manufacturer’s instructions when replacing a carbonating cylinder.
CO2 cylinder exchange or a spare cylinder?
Choose a CO2 refill when you already have a suitable empty cylinder to return. Select a new cylinder supplied full if you have no empty bottle, or want a spare CO2 cylinder to use while another is away for refilling. A refill-only order does not include a new cylinder.
The small-cylinder cards show the current price per refill, excluding VAT. New cylinders and delivery cost extra. For a useful comparison, check the complete basket total, including the number of refills and the delivery or return service you choose.
For our online exchange, order the matching gas refill and return your empty cylinder. Each refill cylinder ordered needs a suitable empty bottle in return. We refill with food-grade CO2 and send the full cylinder back after your empties reach us. Read the CO2 cylinder exchange and empty-cylinder return instructions for the current service, parcel limits and collection option. Those instructions apply to the small range, not the larger bottles below.
What does a dip or siphon tube do?
A dip tube, also called a siphon tube, draws liquid CO2 from inside the cylinder. That is different from a gas-withdrawal bottle. The correct choice depends on the equipment’s requirements, not just how much sparkling water you drink.
Our 3.15kg food-grade liquid CO2 cylinder and 6.35kg CO2 cylinder with dip/siphon tube remain available in this category. Check each product’s specification, exchange conditions and delivery options. These bottles do not fit directly into a SodaStream sparkling water maker or a sparkling water tap.
Small CO2 cylinder filling from a larger bottle requires suitable equipment and competent handling. A filling adapter alone does not establish compatibility or make a transfer safe. Ask us to confirm the cylinder’s intended use with your equipment supplier; this page is a buying guide, not instructions for transferring pressurised gas.
For a broader comparison, read CO2 cylinder sizes and uses. The gas safety and storage guidance covers handling considerations before you choose a supply.
Questions about CO2 cylinders for soda makers
Can I use any CO2 cylinder in a SodaStream?
No. Use food-grade CO2 in a cylinder with the fitting and capacity specified for your machine. A screw-in cylinder and a Quick Connect cylinder are not interchangeable. Check the product details and appliance instructions before ordering.
Where can I get CO2 for SodaStream refills?
Adams Gas offers refills for suitable small cylinders through its online exchange service and collection from the Margate depot. Order the correct refill for your cylinder and check the return instructions before sending empties. Contact us first if the valve or cylinder condition is uncertain.
How much sparkling water can a 425g cylinder make?
A 425g cylinder can make up to 60 litres of sparkling water. Actual output depends on the machine and the level of carbonation you choose. Use the gas to carbonate water as directed by your appliance manufacturer. If you make sparkling water regularly, a compatible spare cylinder lets you keep using the machine while an empty one is away for refilling.
Is a siphon cylinder the same as a soda maker cylinder?
No. The larger dip/siphon bottles provide liquid CO2 for suitable equipment. They are not direct-fit replacements for a small carbonating cylinder. The 425g postal exchange service does not apply to the larger range.
Is this a CO2 subscription?
These are individual purchases. Choose a refill when you have a suitable empty cylinder to return, or a new filled cylinder when you need another bottle. Review the current product and delivery options when you order.
Ready to choose? Compare the small CO2 cylinders, or use our SodaStream-compatible refill and exchange service guide to plan your order.