I have four 14 liter fireman tanks and I replaced the valve to DIN on two of tanks last summer, I had to empty completely and refill from zero. Toke me forever with on and off cooling time. I wanted to tether for BR and the adapters and the Huma regulator all DIN. I still have two valves to replace (or not) but not really liking the idea sitting right beside a running compressor a whole day 

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