Why do beer dispensers need 16g non threaded co2 cartridges?
When beers are canned and bottled at breweries, they are done so with a specific amount of carbonation. When done at a scale like that, there are standards that each beer typically meets before being sent out.
This can get a little tricky when using beer dispensers though. They are also packaged with a standard amount of CO2, but once they are used, that ratio of CO2 can change.