Frequently Asked Questions (FAQ)

1. Which water dispenser brands are compatible with your CO₂ cylinders?

Our CO₂ cylinders and refill services are compatible with all common water dispensers and sparkling water systems . If you are unsure about your model, please feel free to contact us – our team will be happy to help.

2. What cylinder sizes do you offer?

We currently offer the following CO₂ cylinder sizes:

  • 425 g
  • 2 kg
  • 6 kg
  • 10 kg
    Each size is available as a new cylinder and as a refill pack.

3. Do you offer a refill service for empty CO₂ cylinders?

Yes. We offer a refill service for all of our cylinder sizes . Simply send your empty CO₂ cylinder back to us, we will refill it, and send it back to you ready for use.

4. How does the refill process work?

Once you place a refill order, you will receive instructions on how to send your empty cylinder to us. Upon receipt, we fill it, perform a safety check, and send it back to you as quickly as possible.

5. Is the CO₂ food-grade and safe for drinking water?

Yes. Our CO₂ is food-grade and is suitable for carbonating drinking water and beverages. All cylinders are handled and filled in accordance with strict safety and quality standards.

6. How long does delivery take within Switzerland?

Delivery times within Switzerland are generally 1–3 business days , depending on your location and product availability.

7. Can I place a bulk order for my company or office?

Of course. We offer solutions for bulk orders and business customers , including offices, restaurants, and commercial businesses. Contact us for a personalized quote and information on delivery options.

8. Are your CO₂ cylinders environmentally friendly?

We are committed to sustainability, which is why we offer refillable cylinders that help reduce waste and extend the lifespan of each CO₂ cylinder. Refilling is environmentally friendly and cost-effective.

9. What should I do if I am not sure which size I need?

If you are unsure which CO₂ cylinder size is right for your water dispenser or your usage, contact our support team. We will be happy to help you find the optimal solution for your system and your needs.

10. How can I contact customer service?

You can reach us via the contact page on kohlensäure.ch. We strive to answer all inquiries as quickly as possible during business hours.