This depends on two different things – the size and make of your bottle and how often you make sparkling drinks. When we’re simply talking about the average 30–130L of sparkling water, let’s take a look at the average numbers. If you have four fizzy water fanatics in your home, you’ll need to replace a 30L carbonator every 3–4 weeks. If you have the standard 60L carbonator bottle, you can get away with replacing it every 6–8 weeks. This number may vary depending on how often it’s being used.