using RO water + all grain = some kind of water profile? - Page 3 - Home Brew Forums
Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > using RO water + all grain = some kind of water profile?
Sign-up To NEW HBT Article Newsletter - Brewing Articles Direct To You!

Thread Tools
Old 03-01-2011, 02:48 PM   #21
Feedback Score: 0 reviews
mabrungard's Avatar
Join Date: Feb 2011
Location: Carmel, IN
Posts: 3,942
Liked 526 Times on 415 Posts
Likes Given: 33


The RO profile in Bru'n Water represents a typical product water from a home RO unit that has its feed water pre-softened with an ion-exchange water softener (salt water). This arrangement is a typical recommendation for home RO installation in areas with high hardness in order to reduce membrane fouling. That is one reason why the sodium content is a little higher, but even if the feed water was a typical hard water, the sodium content may still be slightly high since the monovalent sodium ions can pass more easily through the membrane.

The Ca and Mg content can be considered typical, the Na content is probably slightly higher than typical, but then you're only talking about a difference of 2 or 3 ppm.

The RO profile is included in Bru'n Water to illustrate that RO water is not ion free, but it has very low ionic content.

Martin B
Carmel, IN
BJCP National
Foam Blowers of Indiana (FBI)

Brewing Water Information at:

Like Bru'n Water on Facebook for occasional discussions on brewing water and Bru'n Water
mabrungard is offline
Reply With Quote
Old 03-01-2011, 03:12 PM   #22
Feedback Score: 0 reviews
Join Date: Nov 2008
Location: Kansas City
Posts: 3,654
Liked 43 Times on 41 Posts


Originally Posted by malkore View Post
Many of the 'grocery store' RO water units don't have frequent filter changes, and thus won't be truly pure. Not saying the water is bad, but it probably isn't the ultra pure 'true RO/DI' water that needs to be reconstituted with some minerals and buffers.
The stores in my area that offer RO list the TDS reading at each service date. Since I know (roughly) the TDS of the feed water, I can gauge the rejection rate. They are both doing better than the quoted rates for domestic units in the low hundreds of dollars so I wouldn't expect a better output with the kind of home unit that is cheap enough that the break even point vs buying the water would ever come.
remilard is offline
Reply With Quote
Old 03-01-2011, 04:46 PM   #23
Feedback Score: 1 reviews
Join Date: Aug 2008
Location: Portland OR
Posts: 5,373
Liked 62 Times on 58 Posts
Likes Given: 29


Real world experience = brewed many good beers with RO water. Brewed many excellent beers with RO water and several minerals added back into the mix. Turns out the AJ Delange Calcium Chloride and Gypsum (as needed) is simple and effective compared to my earlier attempts at being a mad scientist.

Portland water is pretty much a clean slate without RO, and the RO as expected doesn't change the TDS count much.
samc is offline
Reply With Quote

Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Water profile -how to fix... conpewter All Grain & Partial Mash Brewing 72 02-11-2012 06:17 PM
What do you think of this water profile? sudndeth All Grain & Partial Mash Brewing 5 02-19-2011 10:14 PM
Water Profile help caraudio90 All Grain & Partial Mash Brewing 1 02-12-2009 10:27 PM
water profile for well water? nathan All Grain & Partial Mash Brewing 5 05-01-2008 12:27 PM
My water profile Don All Grain & Partial Mash Brewing 6 02-20-2007 12:20 PM

Forum Jump