Dayglow Senior Member Joined: 5 Oct 2007 Posts: 85 Location: Greenville, NC Expertise: I live coffee
Posted Fri Feb 14, 2014, 9:02am Subject: Re: Do you use filtered water for espresso?
I use filtered tap that is allowed to decant for a little while, but I think the general thought is that if heavily filtered, RO, or distilled water is used you need to check your mineral levels and such. Water that is too striped of its flavour components (trace minerals and ions) tends to produce bad results due to off extraction of the coffee. Water test kits are cheap and easy to use, mineral replacement is a little more complicated but doable.
emradguy Senior Member Joined: 31 Mar 2011 Posts: 3,684 Location: Houston Expertise: I live coffee
Espresso: Duetto II; Twist v2 Grinder: M Major, Macap M4, Pharos,... Drip: Espro presses; Aeropress Roaster: H-B "List of Favorites"
Posted Fri Feb 14, 2014, 9:12am Subject: Re: Do you use filtered water for espresso?
I use water filtered by my refrigerator dispenser. It does a good job in my home.
My test kit cost me less than $10 online from an aquarium supply, and has enough reagent for 100 samples. you want a kit that allows you to test both general and carbonate hardness (GH/KH). The brand I have is from API, and I got it from a site called aquacave.com...though there are many, many other options, perhaps even down the street from you at the local pet or aquarium supply.
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calblacksmith Moderator Joined: 25 Nov 2007 Posts: 8,265 Location: Riverside, Ca, U.S.A. Expertise: I live coffee
Espresso: ECM Vene. A1, La Cimbali M32 Grinder: Azkoyen Capriccio, Major Vac Pot: 40s era Silex Drip: Msl. Com. brewers Roaster: gave it a try, decided no
Posted Sun Feb 16, 2014, 12:47pm Subject: Re: Do you use filtered water for espresso?
Most under counter filter systems but NOT RO do well and if you have very hard water then a point of use softener may be advised. If buying bottled water then look for drinking water and be sure it is not distilled or RO sourced.
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takeshi Senior Member Joined: 12 Oct 2002 Posts: 1,062 Location: Houston Expertise: I live coffee
Espresso: Alex Duetto 3.0 Grinder: Super Jolly Roaster: Amaya Roasting
Posted Wed Feb 19, 2014, 12:30pm Subject: Re: Do you use filtered water for espresso?
Not all filtered water is the same. Not all tap water is the same. Not all bottled water is the same. I don't recall the specifics but some minerals are required but too much causes excessive scaling. To determine the suitability of your tap water you'd need to test it and you may need to soften and filter. There's always the Insanely Long Water FAQ if you really want to read up on water.
CoffeeLoversMag Senior Member Joined: 10 Jan 2013 Posts: 218 Location: Seattle Expertise: I love coffee
Posted Thu Feb 20, 2014, 2:15pm Subject: Re: Do you use filtered water for espresso?
Water has a great impact in your espresso. You’re right of asking the best water for your espresso. If I will say bottled water is not advisable, this is not also guarantee that tap water or filtered water is the recommended water for your great espresso. You better have a test kit to find out the key parameters and their target values to achieve the best espresso. These are the pH, TDS, Hardness and alkalinity. The recommended water should have the pH of 7, TDS of 130, Hardness of 62, and alkalinity of 58.
Did you know...? Dark roast coffees actually have less caffeine than lighter roasts due to the fact that the process of roasting burns off caffeine. www.coffeeloversmag.com/theMagazine
kolu Senior Member Joined: 28 May 2013 Posts: 32 Location: Reykjavík, Iceland Expertise: Pro Barista
Espresso: Grimac La Uno Grinder: Mahlkönig Guatemala, Porlex Drip: Kalita Wave, Aeropress
Posted Thu Feb 20, 2014, 4:21pm Subject: Re: Do you use filtered water for espresso?
Sorry for thread hijacking, but: I have mesured water at café where I work. TDS 128, GH 3,5 °dGH (does it mean Hardness = 62 mg/l?), KH less than 0,5 °dKH (that means Alkalinity = 9 mg/l?) at 70 % bypass from Brita water filter. Even straight tap water is pretty soft here (about 150-160 TDS, 5 °dGH, 4 °dKH at my home) in Prague, but with tasteable traces of iron.
Is there a cheap way to increase the alkalinity? Like adding a bit of CaCO3 to the water in test batch? Or we should turn the filter to max (to get rid of iron and other impurites) and add minerals afterwards? I ask because I'd like to do the same at home.
What about filter/drip coffee (Aeropress, V60, Kalita Wave, ...) - is the "ideal" water the same or softer?
khuzdul Senior Member Joined: 24 Mar 2009 Posts: 86 Location: U.S. North East
Posted Sun Feb 23, 2014, 9:06am Subject: Re: Do you use filtered water for espresso?
I use Britta filtered water, even though my tap water is generally good quality.
Household RO is low pressure, and does not remove as many minerals as large commercial RO plants, so it is not super corrosive and is probably fine to use for most household situations. Commercial RO'ed water or distilled water is super aggressive to metal piping, I would avoid using them straight / unmixed.
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