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#14
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![]() This is true, but only on cylinders that over a specific psi. Hence, a lot of chemical fire extinguishers don't require a vis, but CO2 does.
Considering where this guy is, you might be able to find a local scuba shop, or anyone that can legally do a vis. Any one that fills high pressure tanks will usually have someone on site that can do it. The guy that is changing 30 bucks is probably not even doing it, but rather sending it off to one of the other gas company. I know the fire departments hand off the vis(and hydro's) to dive shops, or welding suppliers all the time. The guy doing the vis doesn't have to be the same guy to fill it. And a hydro test shouldn't be above about $30. They just overfill the tank, and measure how much it expands. Quote:
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