yeah its pretty annoying, and I know its only going to get more annoying as we upgrade to the 5L feed tank that you can fill on the fly. Getting some gear pumps on the output may be another future investment as well. Would be a dream to just keep filling the tank and changing out vessels without ever breaking vac or stopping flow.
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You can do what is essentially a double block and bleed type collector system to swap flasks without without breaking vac or needing gear pump. Multiple ways to do it. Theres pics of some setups like this around the forum I’ll put here as I re. find em
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hmmm interesting, I will look into that a well.