Thank you for choosing a GROHE Blue System! Now is the perfect time to purchase the CO₂ starter kit. The five CO₂ bottles will guarantee an end to annoying shortages.

1. GROHE Blue System
Your GROHE Blue Home system already includes one 425 g CO₂ bottle.

2. Buy a Starter kit = 4 x 425 g CO₂ bottles
Order one CO2 Starter Kit (40 422 000). This includes four CO2 bottles, you should now have five bottles (including the one which came with the GROHE Blue System).

3. Second time you order the Refill kit 
As soon you have four empty CO₂ bottles, you can order a refill kit (40 687 000), so that we can refill four of your bottles as you are using the fifth one.
When you order a refill set you will receive a shipping label by email. Print this off and use the label to return the empty bottles. After receipt of the empty bottles in our service center, we will send out four new CO₂ bottles.

1 + 4 = 5
The first bottles of your GROHE Blue system together with the GROHE CO2 refill process ensures that you always have a full CO2 bottle, and you will never miss refreshing CO2 from natural sources in your filtered tap water.