The genuine SodaStream 425g Screw-In CO₂ Cylinder is the classic blue cylinder that fits most screw-in sparkling water makers. Simply twist it into place and you're ready to make up to 60 litres of sparkling water, saving over 120 single-use plastic bottles along the way.

Gas4U delivers SodaStream cylinders to homes across Ireland, with a straightforward process for returning your empties.

Why Choose the SodaStream Screw-In 425g CO₂ Cylinder?

Trusted SodaStream Quality This is an official SodaStream cylinder, filled with food-grade CO₂ for consistent, reliable carbonation.

Fits Most Screw-In Machines The blue screw-in cylinder suits a wide range of sparkling water makers that use the traditional screw-in connection. No adapters needed.

Up to 60 Litres of Sparkling Water Each cylinder carbonates up to 60 litres, which is about:

• 60 x 1-litre bottles
• 120 x 500ml bottles

Your fizz level makes the difference. Lightly sparkling water gets more from each cylinder, while extra fizzy drinks use more.

Great Value Over Bottled Water A spare cylinder saves you money on bottled fizzy water and spares you from carrying heavy cases home. Make plain sparkling water or your own soft drinks whenever you like.

Healthy Hydration Sparkling water made at home has zero calories, no artificial sweeteners and no preservatives.

Delivery and Returns Made Easy We deliver nationwide. One-time customers return empties with a single free return label and earn credit for each cylinder. Subscribers save up to 50%, enjoy free shipping and have empties collected at renewal.

FAQs

Which machines does this cylinder fit? It fits sparkling water makers with a traditional screw-in CO₂ connection. It does not fit Quick Connect machines such as the SodaStream TERRA, ART or DUO.

How do I fit a screw-in cylinder? Remove the cap, insert the cylinder into the machine and screw it in clockwise until it's hand-tight. Don't use tools or overtighten.

How much sparkling water does it make? Up to 60 litres, depending on your preferred level of carbonation.

Is the CO₂ food grade? Yes. The cylinder contains food-grade carbon dioxide, suitable for drinking water and homemade sparkling drinks.

Is there a lower-cost alternative? Yes. The Gas4U Screw-In 425g cylinder offers the same capacity and food-grade CO₂ for less.

How often will I need a new cylinder? Drinking around one litre of sparkling water a day, one cylinder typically lasts six to eight weeks.

What happens to my empty cylinder? Send it back through the Gas4U returns process. One-time buyers get credit towards their next order; subscribers arrange a free collection after each renewal.

Can I keep a spare cylinder at home? Absolutely. Having a second cylinder means you can swap immediately and never run out.