---
title: How do I change the CO2 cartridges?
description: "How to get Restube ready for use again is explained in detail in the instructions as well as printed on the buoy and bag. Attention: RESTUBE only guarantees its functionality when used with the original RESTUBE CO2 cartridges."
---
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1. [B2C Restube FAQ](https://knowledge.restube.com/?hsLang=en)
2. [Safety Buoy](https://knowledge.restube.com/safety-buoy?hsLang=en)
3. [CO₂ CARTRIDGE](https://knowledge.restube.com/safety-buoy?hsLang=en#co-cartridge)
# How do I change the CO2 cartridges?
How to get the safety buoy ready for use again is explained in detail in the instructions as well as printed on the buoy and bag. Attention: RESTUBE only guarantees its functionality when used with the original RESTUBE CO2 cartridges.
First any contamination (e.g. sand) must be removed from the safety buoy, the trigger and the CO2 cartridge. Then the empty CO2 cartridge is unscrewed from the trigger and disposed of in the recycling center. Then fold in the release lever. Check the new CO2 cartridge for damage before screwing it in and make sure that the puncture cap is closed. Then screw it firmly into the release mechanism.
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