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Old 07-13-2010, 01:26 AM   #31
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What kind of acid, and where can I get it? I'm always concerned about properly disposing of stuff like that.....I'd hate to have them track it back to me.....


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Old 07-13-2010, 01:41 AM   #32
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Add some salts and stuff and you'll neutralize it, depends on the acid. I'm sure you could find instructions online.


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Old 07-13-2010, 05:02 AM   #33
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Muriatic acid can be found at most hardware stores. Add acid to water, not water to acid, wear neoprene or nitrile, and neutralize with baking soda.

I worked for a paint removal company years ago, we used hydrochloric acid to pickle steel. Used a 6 water to 1 acid ratio. I would start with that, even though the acid you buy will be more dilute than what we used.
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Old 07-13-2010, 05:15 AM   #34
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Three gallons has been a deal killer for me when I've looked at those coffee makers. Hopefully you will get something working out of it, love the price you paid!

Looking at the inside I now know why most coffee from those machines taste like crap.
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Old 07-13-2010, 05:09 PM   #35
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What about CLR? It's cheaper, safer, and works pretty good if undiluted........?
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Old 07-13-2010, 05:22 PM   #36
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Here's a potential option...

I have one of the "super-automatic" espresso machines at home (was a gift to SWMBO for finishing her Ph.D. in EE). With time, the hardness builds up in the machine and it requires descaling.

You can find descaler in either powdered (what I use) or liquid form; it gets pumped through the machine automatically, then rinsed. I would assume that you should be able to find this at a local store where they sell espresso machines, or go on-line to somewhere like wholelattelove.

Since it's made for this purpose, and far safer than acid, it is probably the first thing I'd try if I were in your shoes.
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Old 07-13-2010, 05:42 PM   #37
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How did I miss this cool thread? *subscribed*

Great find Steve!
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Old 07-15-2010, 01:27 AM   #38
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Okay, so here's a little update. I need to make a little disclaimer: Don't do what I did! If you do, you are doing so at your own risk. All manufacturer instructions should be followed when using chemicals, and proper protective clothing (goggles, gloves, and long shirt/pants) should be worn!

I used a properly diluted mixture of muriatic acid, and it worked awesome! I dipped it halfway in for about 30 mins, lightly scrubbed with a carboy brush, then drained and flipped it to immerse the other end of the tank. Lather, rinse, and repeat.

This stuff is no joke, it was like Roger Rabbit and the "Toon Dip":

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Old 07-15-2010, 01:30 AM   #39
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SO here's some pics of the tank as it was soaking, etc.:
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Old 07-15-2010, 01:32 AM   #40
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And here's the good stuff! There is still a slight ring around the top, but I plan to get in there with some BKF and seal the deal. I'll probably pull the brass fittings and either replace with new hardware or plug the holes.


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