Just a Note, Most HPA Tanks get Re-Tested every 5 years, unless it's 2015 now then i would think thats the Death Date (The Date the bottle can no longer (Legally) be used as it would be unsafe to do so)05/20doesnt the dye tank get tested every 5 years because if it does then it wouldn't run out on 05/20
Hope this helps.
Thanks
James T
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