I took a new 100 lb propane cylinder to UHaul to get it filled. I told him it was new, but I'm not sure this guy was fully up to speed on what to do. I wasn't either, other than knowing that purging was a thing. He filled it then opened the "purge valve" until vapor came out. Is that correct? I've been reading tonight and see that some sites say that 4-5 cycles need to be done before the tank is filled. Do I have an improperly filled tank? Here is a pic of my POL valve:
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