I didn't see any visible sign of a bio film or pellicle but the evidence is in the taste and from samples under a microscope:


I soak these in oxy-clean free in hot water for a couple hrs each brew and then in sanitizer.
It looks like the piece of pipe is either rusted or has some sort of build up. It honestly seems rusted as I can't even scrape it off. It's possible this is actually chrome since I've seen the exact thing on some of the chrome tail pieces I have on my taps.
Here's my solution for just capping it off. Just a plug and some washers from everwood. I'll dismantle these and soak in oxy each brew.

Still happy with the purchase just wish I had sense enough to throw these spigots away back a few months ago when I became worried about them. I'm brewing my Kolsch again today and gonna try to push it out before the submission date but I know i don't have enough time.
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