I *think* I've found the right adapter to connect our old regulator to a paintball tank for making fizzy water :>!
This tank will be far more convenient to carry/refill than our old 5kg tank. If one paintball tank isn't enough (say we go though it too fast, we can easily get another one).
@rek what’s your setup? I’m using a paintball tank adapter in my Soda Stream now, but I hate how it wastes gas by using it for agitation.
My original setup was an automotive valve stem mounted in a soda bottle top, but it wasn’t reliable enough.