[Homeroast] aluminum for roasting

Phil Palmintere phil.palmintere at gmail.com
Mon Apr 12 23:41:09 CDT 2010

I hadn't thought about it until now; maybe I'm getting old, or maybe it's
the exposure to aluminum.

Hot water heaters we all have in our homes are stainless steel tanks with an
aluminum rod suspended inside -- it is called the "sacrificial anode".  The
aluminum is consumed (<== highly technical term use) over the years instead
of the stainless steel of the tank (hence the word "sacrificial").  Once the
sacrificial anode is gone, then the stainless steel of the tank will go.

And the only difference between a hot water heater with a 6 year warranty
and one with a 12 year warranty is that the latter have *two* sacrificial

And of course they are replaceable; I change mine every 4 years just to be

Here's a picture of the rod - a new one, and an old one.  The old one only
shows the steel core wire left; all the aluminum has been consumed into the
hot water.


So... do espresso machines have sacrificial anodes in their boilers?  My
guess is they don't.  Has anyone had a boiler go bad?


> The newer Gaggias--even the lower-end "Color" line--now have stainless
> boilers.
> >
> >> Ever look into the aluminum boiler on your espresso machine?
> >>
> >
> > Only if you have a Gaggia.  Most machines use copper or brass for the
> boiler.  My La Marzocco uses stainless steel.
> >

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