CZMDM
Contributor
Per Infra:I was working with another instructor with some large groups. We were using tanks supplied and filled by Infra. The air was not contaminated with CO, but the air tasted very oily, which is usually a sign that the filter had not been changed for quite awhile. The other instructor (who is a very sweet guy who I have never even seen angry in the many years that I have known him) went to Infra and told them of the problem we experienced. Infras response was to ban my friend from from renting their tanks for 6 months. One other problem we had with Infra is that their tanks were often filled below 3000psi. It happened so often that we never use them anymore.