Bought 2 of these to use paintball tanks with a home barrel setup. Both passed. Sharp internal edges on one of these appear to cut through the o-ring during installation (even with a fresh o-ring). My solution was to put an o-ring in the top of the adapter so the can compresses and seals against the top edge of the paintball tank as it is screwed in. Also, the pin on one of them seems to be too long, it bent the valve on my paintball tank when I screwed it all the way in without putting an extra o-ring on top.
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