Just a heads up, I filled up my 6 Flame King 1lb cans yesterday and 1 of them just would not seal up and was hissing and leaking propane out of the valve on top. I tried re-screwing it in to the refill adapter, used a small screw driver to poke the needle to try to get it to re-seat and nothing would work. For now, I just screwed it into my buddy heater, but there's no way I'm using that tank again. I've only refilled this tank maybe 5 times at most and have always used brass thread protectors on the top when it's not hooked up to anything. I've sent an email to Flame King, so we'll see what they have to say. This is a post-recall tank, so even though these are meant to be refilled, definitely check them each time. Pretty discouraging, but hopefully Flame King makes it right and replaces it.