Are there different grades of CO2?
Yes, in the United States there are two basic grades of CO2 that you can find. Beverage/food/welding grade which is 99.99% pure CO2 with the main contaminant being water. The other grade is Medical grade. Medical grade CO2 is 99.999% pure. That extra 9 costs a lot of money. Some places will try and tell you that there is a difference between welding grade and food/beverage grade. If this is the case then that difference happens at their location. If you could be there when the CO2 truck comes you would find that they fill both containers from the same truck.
EntoCraig wrote:So essentially the Co2 would be the same and its the containers they are stored in that make the difference?
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