The instructions for the "Little Bottler" say to fill bottle to top and this will leave the correct headspace.
I have found that doing this with PET bottles leaves a minuscule headspace.
I have filled them to the bottom of the thread part of the bottle, this leaves about 1 inch when the "Little Bottler is removed"
Is this the correct headspace or should I fill to the top as instructed?
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Comments
I do leave about an inch on mine, but I re-use glass beer bottles that are all 500ml. I am not sure on the size of the plastic bottles you are using.
I don't think it really matters too much, as long as you dont fill them right up to the top and there is "some" gap.