Counterflow Chiller

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Hi, I'm an Italian Homebrewer. I think you can help me.
More or less 1 month ago I built a counterflow chiller in copper. Here
there are some photos:
I use it only one time and I'm satisfied, because it works properly
(from 210F to 75F).
But, now I have a big problem. I'm afraid that the copper tube where
passes the hot beer can oxidize and give to beer dangerous component.
So is this possible? Try to explane me with scientific prove, because
also in italy my colleague home brewer told me "Uhmmm... maybe" or "No,
I don't think" or "I don't know, but I will continue to use it".

Another question: after using the counterflow, how can I clean it, in
order to avoid the oxidation? Someone told me to use vinegar, or a
ammonia solution 10%. Some ideas?

I thank you all.

Zio Kento that try to write in correct english... mission impossible! :-)

Re: Counterflow Chiller

It looks like you did a great job building the CFC.  I'm still planning
building mine but this is what I've been reading about the CFC

From Before using your counterflow chiller, give it a thorough cleaning to
remove any
dirt trapped inside the tubing. Pour a mixture of hot water
and dishwashing
detergent through the tubing (using a small tunnel)
followed by a hot water
rinse. Repeat until the rinse water is clear
and clean.
Sanitizing your chiller is easy. After each use, simply run a few
quarts of
boiling water through it, straight into the drain, without
any cooling water
going through the hose. That flushes out trapped
droplets of wort, sanitizing
the entire length. Next time you use it,
dont turn on the cooling water until
you let a cup or two of boiling
wort run through the chiller into a bucket or
drain (not a glass
Stop the flow and throw away the first bit of wort. Then turn on the
water and start collecting your cooled wort normally.

From To sanitize the device, a sanitizing agent must be run through the
inner copper
tube for 10 or 15 minutes prior to use, then the agent
must be thoroughly
flushed with water. After being used, it should
again immediately be flushed for
5 minutes with really hot water. Of
course, since it is the inside of the inner
copper tube which comes in
contact with the wort, one never really knows if the
chiller is clean.
There could be all kinds of gunk inside that tube, and we'd
never know
about it. This is why the brewer must be absolutely meticulous when
cleaning and using a CF chiller. There is absolutely no room for
laziness or
poor sanitation habits.
Probably the most effective way to ensure proper sanitation of a
chiller is to use Powdered Brewers Wash, details of which
can be found on our
sanitation page. This product is designed
specifically for clean-in-place
applications in the brewing industry,
where you cannot see the surfaces you are
cleaning. It is extremely
effective at removing the organic compounds left
behind by beer and
beer wort. Another good cleaner to use here is OxyClean. Both
of them
need to be extremely well rinsed, and afterwards the chiller needs to
sanitized with a sanitizing solution. If you have a pump, an
effective way to
sanitize a counterflow chiller is to circulate 170F+
water through it from the
hot liquor tank for 5 or 10 minutes.

As far as copper oxidation; the majority of our water pipes here are
made up of
copper.  I haven't heard of any problems with is.

Hope that helps.



::It is my design to die in the brew-house; let ale be placed
to my
mouth when I am expiring, that when the choirs of angels come, they may
say, \"Be God propitious to this drinker.\" -- Saint Columbanus, A.D.
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