Posted Tue Apr 9, 2013, 6:12am Subject: How to descale a coffee maker
I know I shouldn't be asking this here but I can't think of a better place. My work just inherited a commercial brewer. We have VERY hard water here and I have to keep it working. Can anybody tell me the proper way as well as what chemicals to use to clean and descale a commercial brewer? It's a pour over (non plumbed) machine.
calblacksmith Moderator Joined: 25 Nov 2007 Posts: 7,312 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Veneziano A1 Grinder: Many different commercial Vac Pot: 40s era Silex Drip: Milita, Bunn&Curtis... Roaster: Cast iron pan, gas burner
Posted Tue Apr 9, 2013, 7:22am Subject: Re: How to descale a coffee maker
What machine is it? I have found that for me, the easiest way to clean out a pour over brewer is to just take it apart. At least take the top off of the "boiler" or the place where the water is heated and give it a look see what is inside.
There are several commercial descaler products on the market, I think you can even buy coffee pot "cleaner" in a supermarket by MR COFFEE, if I remember correctly, it claims to descale.
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Posted Tue Apr 9, 2013, 8:04pm Subject: Re: How to descale a coffee maker
You are right: Descaling is a common problem here.
What I use is food-grade Citric Acid (powder). I buy it from The Silk Road Spice Merchant in Calgary, look here.
Concentration for my Air-O-Swiss humidifier, for my Panasonic Hot-Pot and one or two other things (that boil) is 27 grams/liter and it works best above 140F. The hot-pot boils it for around an hour and every bit of hardness is removed.
I like the idea that it is food-grade and if anything remains after rinsing it won't be harmful. In cooking I believe it is used in Polish cabbage-soup and probably in Chinese hot-and-sour soup. You will find it, in 30g containers, in some stores under the name 'Sour-Salt' but I needed to buy it in bulk (by the kilogram).
stevew443 Senior Member Joined: 29 Apr 2013 Posts: 1 Location: Shenandoah Valley, WV Expertise: I love coffee
Posted Sat May 4, 2013, 5:25pm Subject: Re: How to descale a coffee maker
I am coming late to this discussion, but I just use white vinegar to descale my coffee makers. We have extremely hard water here and a coffee maker can clog up in just a month or two. I just fill the reservoir with vinegar and run the brew cycle and then run through two reservoirs full of plain water to clear the vinegar out. Works like a dream.
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