We do enjoy having some fizzy water now and again, but hate to have to purchase bottles for it. We decided against getting a soda stream given the fact that its bottles are proprietary and cannot be filled by anyone other than them. Making your own system is way better, and if you've got a big tank it'll last for a long, long time.
Here's what you'll need to get, this is also the order in which you need to connect them together:
- 5KG CO2 tank
- A regulator
- 1m of of vinyl tubing
- A ball-lock keg coupler
- A carbonator bottle cap
- A soda bottle (for carbonation with a reinforced bottom).
For a full tutorial, check out this site.