Please note: this cylinder is not compatible with the SodaStream E-TERRA machine. We're working to resolve this.

Get fresh sparkling water in seconds with the Gas4U 425g Quick Connect CO₂ Cylinder. Built for sparkling water makers that use the Quick Connect system, it clicks into place with no twisting or screwing. Each food-grade cylinder makes up to 60 litres of sparkling water, replacing over 120 single-use plastic bottles.

It's our own Gas4U cylinder, so you get the same fizz for less. Pair it with fast delivery across Ireland and simple empty returns, and keeping your machine topped up has never been easier.

Why Choose the Gas4U Quick Connect 425g CO₂ Cylinder?

Simple Click-In Installation The Quick Connect design slots straight into compatible machines. No fiddling, no twisting, no screwing. Just slot it in, lock it down and start fizzing.

Makes Up to 60 Litres of Sparkling Water Each 425g cylinder carbonates up to 60 litres of water, roughly:

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

How far it goes depends on how fizzy you like it. Lightly sparkling water stretches a cylinder further; extra fizz uses more CO₂.

Better Value Than Branded Refills The Gas4U Quick Connect cylinder gives you the same 425g of food-grade CO₂ at a lower price than branded alternatives. Subscribe and you can save up to 50%, with free shipping included.

A Healthy Way to Stay Hydrated Plain sparkling water has zero calories, no artificial sweeteners and no preservatives. Add a dash of flavour or enjoy it straight.

Delivered to Your Door Anywhere in Ireland Skip the trip to the shops. We deliver fresh cylinders nationwide, so your machine is always ready to go.

Easy Cylinder Returns One-time customers can return their empties in one go with a free return label and get credit towards their next order. Subscribers get a reminder before each renewal and we collect the empties for you.

FAQs

Which machines does this cylinder fit? It fits sparkling water makers that use the Quick Connect (click-in) system. It is not currently compatible with the SodaStream E-TERRA. If your machine uses a screw-in cylinder, choose our Screw-In 425g cylinder instead.

How do I tell if my machine uses Quick Connect or Screw-In? Quick Connect cylinders slot in and lock with a lever. Screw-in cylinders twist into the top of the machine. If you're unsure, use the Gas4U Compatibility Checker or contact our team before ordering.

How much sparkling water does one cylinder make? Up to 60 litres, depending on your preferred level of fizz.

Is the CO₂ food grade? Yes. Every Gas4U cylinder is filled with food-grade carbon dioxide, safe for carbonating drinking water and homemade soft drinks.

How is this different from a SodaStream Quick Connect cylinder? Both hold 425g of food-grade CO₂ and make up to 60 litres. The Gas4U cylinder is our own brand and costs less.

How long will one cylinder last? If you drink about one litre of sparkling water a day, expect six to eight weeks, depending on how fizzy you like it.

What do I do with my empty cylinder? Return it through the Gas4U returns process. One-time buyers receive credit towards their next order. Subscribers simply schedule a collection within 15 days of renewal.

Can I keep a spare? Yes. Many customers keep a second cylinder so they can swap straight away when one runs out.