Yes, the same area

Indeed, from what I have read (from PALMER to "Brewing Microbiology" by Priest and Campbell) it looks like acetobacter. The question is how to get rid of it I'm using Brewtools brew system and SS Brewtech Unitanks as fermentors. WHat do you call "Brewtools kit"? Thier proposed multi-valve...

Yes, I measure pH during my brew - pH ~ 5.4-5.6 for my beers, I don't expect it to be a problem. I also changed different yeasts and used just a new yeast packs... No difference

No Teflon tape, no threaded connections It looks like quite resistant yes... I will try tomorrow to soak everything into peracetic acid after thorough PBW cleaning (again...)

From plastic parts I only use silicone gaskets for tri-clamps and silicon hose (relatively new). The rest is either on the hot side or removed from the setup (like aeration stone/connection)

Couldn't find iodophor in the Netherlands, so have chosen peroxyacetic acid. Hopefully, it will do the job as well

Correct, I also suspect transfer equipment + coldside (primary fermenter). I'm using a counterflow chiller (parallel plate chiller has been removed the first from the system, but it didn't help :-( ). Through the valve setup I can circulate hot wort through the counterflow chiller during boiling...

...I would soak everything you have in iodofor for a few hours.... Do you have a commercial name for that? I will try to find the analogs. I'm using SS brew tech unitanks.

Dear all, sorry for the (potential) old problem topic, but I'm desperately looking for the advice to the scale: Already several months I cannot make any brew batch as my beer is getting contaminated, namely, it becomes absolutely sour (no, I didn't brew sour at all). In the beginning, I got a...