Originally Posted by sirquack
For CO2 tanks for beer dispensing check beer crazy in clive/urbandale or Fessler Carbonic on E Ovid in Des Moines. They provide CO2 for the food/beverage industry. You don't want to use the CO2 provided by fire stations, welding housed, or paintball companies, there is a difference. Most home brewers that are into kegging in the Des Moines area use one of these two sources.
I'm not trying to be a jerk, but.... I have been in the Welding Supply/Gas Distribution business for just short of 20 yrs.! That being said there is absolutely NO difference in the Co2 being put into a "welding" cylinder or a "beverage" cylinder and at the majority of the distributors there is no distinction between the two. One coming back from a welding shop today could be refilled and delivered to a restaurant tomorrow.
Both product comes out to the same bulk tank and manifold that is filled by the same bulk tanker that fill the welding distributor, fire extinguisher service center or dry ice manufacturing facility. I would not recommend buying into the whole "food safe" marketing ploy. When was the last time you have heard of someone becoming ill from contaminated Co2, literally millions of people consume it a day in the US alone.