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Hi everyone A few days ago I ordered this cheapo tea urn form Amazon( https://www.amazon.co.uk/gp/product/B00IECC0LS/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 ) for my small BIAB batches. It's 20L/5gal, 2400w concealed element and I'm planing to do 6l/1.5gal batches. Now I've done my...

You may have a point about reproduction there, but I would assume there are not that many yeast in the bottle and they are not reproducing as much under those conditions, and what is "only 1 cubic inch” for us is huge for them. Besides I feel there is enough evidence for me to accept that...

Yeah, I guess it's the way they "engineer" their yeast. Whatever it is I'm usually inclined to follow the procedure on the package. But all this is not important for the discussion going on here. Where I was actually going with this is just to reaffirm the fact that oxygen plays no role in...

It appears that purging the whole bottle probably makes no difference (it did not made any difference in the experiment Tauro did; see link in my post above) What I think is that bulk of oxidation comes from long term exposure to oxygen in the headspace, especially since bottle is under pressure...

Here is the link to a thread discussing bottle head space "purging". Taket_al_Tauro did a small experiment and posted the results with pictures. https://www.homebrewtalk.com/forum/threads/limiting-oxidation-effect-of-purging-headspace-o2-in-a-bottle-conditioned-ipa.653784/

Respectfully, this is inaccurate. I'll share a link that explains why but before I do I'll offer my, admittedly, simplistic explanation: Oxygen is not relevant at all in fermentation. The word you are looking for is respiration - the other metabolic pathway yeast can use, which involves oxygen...

That would be beyond my knowledge level. If you have some links please do share. I have ordered can of "Private preserve" yesterday. It's, apparently, a mix of argon nitrogen and CO2 (I tough it was argon only) so we will see how that works for me soon. I hope I get similar results to...

Thank you for this. It only further proves that the biggest concern is head space oxygen, which makes sense really as it is the oxygen beer is the most in contact with. I'm thinking now....if brief contact with oxygen from the atmosphere would really oxidase beer imagine what would prolonged...

I'm not saying I know anything but will offer my opinion on this anyways :) . I feel that bottling straight from the spigot (especially if you cold crash and don't bring the temperature up) would introduce some oxygen to the beer. I feel that splashing of beer against the bottom of the bottle...

Yeah, that's surely worth a try. But as I said it doesn't matter how we do it as long as the results are there. All I did in a previous post is tried to stop a debate before it even starts because I saw on other forums how heated and unnecessary debates about this can be.

And just to be technically correct here (as someone said "the best kind of correct) we are not really talking about O2 purging here. As other, more knowledgeable people on other threads and forums, pointed out: to really purge O2 you would have to have a liquid pushed out, and replaced, by...

Or maybe one of these with some kind of nozzle fitted? I came across that idea on this or some other forum, can't remember now.

Well, there's only one way to find out. As I said I make small batches only so it wouldn't be too bad if I have ruined one batch. And I am sure it wouldn't be completely ruined too, i guess it would still be drinkable but not perfect/the way you want it to be. I agree, I wouldn't say yeast and...

Yeah I saw that too. I hate that it's gonna cost me 7 more quid to ship it to Ireland and I can't find it in Dublin (you can't find anything in this village)

Yes, that's what I was planing. Although I believe your findings 100% I would like to see it for myself. I plan to brew NEIPA in January/February that's why I'm researching this now and that's how I came across this thread. I will make sure to post some pictures as well once I try this method...

Thanks for the reply. As I'm brewing small batches only(2 gallons) this is a great option for me as there are not too many bottles to go through. Please keep us posted on you experiment with higher fill ups.

I know it's 15 months old thread but I'll still chance it. How many times/ how long do you purge the head space? By the way amazing info there, I don't know how this did not get more attention.