--- title: My sparkling water isn’t as fizzy as previously or it seems to be running slow from my Zip HydroTap description: If your sparling water is not fizzy or its running slow you might need to replace your CO2 bottle --- [Skip to content](https://support.amamus.coffee/knowledge/my-sparkling-water-isnt-as-fizzy-as-previously-or-it-seems-to-be-running-slow-from-my-zip-hydrotap#main-content) English Show submenu for translations [Problem not solved? Log a support ticket here](https://support.amamus.coffee/knowledge/kb-tickets/new?hsLang=en) ![Amamus\_logo\_black\_large.png\]](https://support.amamus.coffee/hs-fs/hubfs/Amamus_logo_black_large.png?height=40&name=Amamus_logo_black_large.png) Open main navigation Close main navigation - English Show submenu for translations - [Problem not solved? Log a support ticket here](https://support.amamus.coffee/knowledge/kb-tickets/new) Welcome to our Knowledge Base. 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[Zip Taps](https://support.amamus.coffee/knowledge/zip-taps?hsLang=en) # My sparkling water isn’t as fizzy as previously or it seems to be running slow from my Zip HydroTap ## If your sparling water is not fizzy or its running slow you might need to replace your CO2 bottle If your sparkling water is flat or dribbling out, you will likely need to change your CO2 bottle.  The G5 command centre also has an LCD indicator that gives a rough indication of the likely percentage of remaining gas.  However this is often wrong so please don't rely on this.  Bottles often need changing even when 30% remaining is indicated.   **Changing your CO2 bottle** 1-Using the LCD screen press **MENU** (top left icon with three lines)\>**SYSTEMS SETTINGS**\>**CO2 SETTINGS**\>**PURGE CO2\>PRESS START** 2-This will release any CO2 left over in the hoses 3- Turn the regulator off on the CO2 bottle 4- Remove the regulator from the CO2 bottle  A-For the smaller bottles hold the bottle vertically  and unscrew the bottle from the regulator  B- For the larger bottles use an adjustable spanner and unscrew the regulator from the bottle 5- Remove the the cap on the new CO2 bottle and fit the bottle to the regulator and once tighten turn on the the regulator 6- As you tighten the bottle you will hear some CO2 gas leaking out, quickly tighten the bottle to stop this. Ensure that no further gas is leaking out once this is complete by listening for leaking gas 7- Next you need to complete a CO2 purge on the LCD screen on the command centre. Press **MENU\>SYSTEM SETTINGS\>CO2 INFO\>CO2 PURGE\>PLAY**. This process takes about 30 seconds 8- Once complete you now need to reset the CO2 on the command centre, press the CO2 RESET\>PRESS CO2 RESET (again)and then the button below to confirm   If you have any questions about changing your CO2 bottle please contact Amamus via this [Support Form](https://support.amamus.coffee/knowledge/kb-tickets/new?hsLang=en) and raise a ticket. https://support.amamus.coffee/knowledge/kb-tickets/new   - [JURA Coffee Machines](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#main-content) - [Jura GIGA x3 / GIGA x3c Coffee Machine](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#jura-giga-x3-giga-x3c-coffee-machine) - [Jura X10 Coffee Machine](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#jura-x10-coffee-machine) - [Jura JX10 Coffee Machine](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#jura-jx10-coffee-machine) - [Jura W10 Coffee Machine](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#jura-w10-coffee-machine) - [Error Messages](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#error-messages) - [Jura Common Issue's](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#jura-common-issues) - [Instructions](https://support.amamus.coffee/knowledge/jura-coffee-machines?hsLang=en#instructions) - [WMF Coffee Machines](https://support.amamus.coffee/knowledge/wmf-coffee-machines?hsLang=en#main-content) - [WMF 1100](https://support.amamus.coffee/knowledge/wmf-coffee-machines?hsLang=en#wmf-1100) - [Hot Chocolate not working](https://support.amamus.coffee/knowledge/wmf-coffee-machines?hsLang=en#hot-chocolate-not-working) - [Peak 50](https://support.amamus.coffee/knowledge/wmf-coffee-machines?hsLang=en#peak-50) - [Zip Taps](https://support.amamus.coffee/knowledge/zip-taps?hsLang=en) - [Bravilor Coffee Machines](https://support.amamus.coffee/knowledge/bravilor-coffee-machines?hsLang=en) - [Victoria Arduino](https://support.amamus.coffee/knowledge/victoria-arduino?hsLang=en) - [Culligan Taps](https://support.amamus.coffee/knowledge/culligan-taps?hsLang=en) - [Support Request](https://support.amamus.coffee/knowledge/support-request?hsLang=en) [![Chill listening crop-3](https://support.amamus.coffee/hs-fs/hubfs/Amamus_logo_black_small-1.png?width=134&height=24&name=Amamus_logo_black_small-1.png "Chill listening crop-3")](https://amamus.coffee/support/) Amamus Copyright © 2026, Amamus Ltd.