WTF are CO2 tanks so expensive here?

[hirschb]

Yep. The American bottles have a 0.83" 14 TPI thread and Australian bottles have 0.86" Whitworth parallel thread (also 14TPI but a different form).
You can sort of fit an Australian reg onto a US bottle, but its a bit dodgy - see comments above - not the other way around. If you do a bit of digging you might be able to find an Australian type 30 nut and just change that rather then the whole regulator.
Mark

Edit
Look for a Soda Stream Adaptor, they aren't hard to find and will do the job .
M

OK, thanks for the tip!

 

[Cecilweetabix]

The price issue is called the Australia Tax. High cost of living means high margins on everything here. Just feels like you are being ripped off so much of the time. Still - I know where I would rather be

 

[natt]

Integrated Safety Group in Townsville can fill and service your CO2 Cylinder - 2/59 pilkington street, garbutt 47791119