25 replies to this topic

[Graeme]

The CO2 bottle is certified for 10 years if new..
My local homebrew shop also does swap bottle.I take my empty one in and swap for a full one just like the BBQ gas bottles.
So I may actually never have to worry about certification again.
I also dont think its that expensive to do,about $50 from what a mate told me a couple of years back.

Hope that little bit of info helps.
Graeme
ps I did hire from BOC and the 12 months i did, rental went up $2 a month.They make money from refills not hiring so would prefer to hire to a HEAVY user than a casual user.I got about 12 months from a 6kg bottle.My bought bottle is 6.8 like the above mentioned one.

[shaggy]

how much does the paintball tank hold?
i had thought of them, but figured they'd need filling all the time.

Got the size of the 6.8kg tank:
690mm high
180mm wide max

They hold about 20oz, I use it on a small tank (40L) and it lasts ages.

[keleherr]

i had considered using one of my scuba tanks. They cost me $300 new and hold 12litres and handle 232atm of pressure. I looked up a conversion for CO2 and 1 litre of CO2 liquid (under tank pressure) weighs close to 1kg, so thats a 12kg tank for $300. But i highly doubt anyone would fill it - plus the conection is completely different...
I was considering a fire extinguisher, but i'm thinking i'd rather spend a bit more and do it right...

CO2 has no liquid state its one of a few elements that goes straight from a solid gas state and vise versa.so there would be a different pressure factor when say compared to O2 or natural gas.
like its already been said do it properly and safely

[Jezza]

CO2 has no liquid state

this is true at normal pressure (hence the name 'dry ice') but i dont believe this is true when compressing it, it will become a liquid.
Have a look at this conversion site:
http://www.uigi.com/co2_conv.html

[keleherr]

increasing pressure only changes the temp a change of phase will occur at. with water in a pressure cooker,increase in pressure causes an increase in boiling point.

[Jezza]

well i got my regulator now, and will be picking up my co2 tank on friday.
i must say that the fella's at u-brew-it are most helpfull.
they ordered in the tank and got it delivered to my local store to make it easier for me to pick it up.
Anyone looking for a co2 tank, send an email to Tim at the midvale store (ubrewit@amnet.net.au) and i'm sure he can look after you like he did for me.