Author Topic: How long to boil to rid chlorine?  (Read 2226 times)

Offline tcanova

  • Assistant Brewer
  • ***
  • Posts: 182
  • Fayetteville Arkansas
    • View Profile
How long to boil to rid chlorine?
« on: August 31, 2013, 01:25:41 PM »
With the long weekend I thought I would try using my city water to brew, I usually use RO and add salts, but our city water is pretty good for brewing except for the chlorine. So how long should I boil the water the day before to rid the water of the chorine?
What's the worst that could happen?  Beer?


Wooo Pig Sooiee

Offline jeffy

  • Brewmaster General
  • *******
  • Posts: 2449
  • Tampa, Fl
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #1 on: August 31, 2013, 02:03:05 PM »
With the long weekend I thought I would try using my city water to brew, I usually use RO and add salts, but our city water is pretty good for brewing except for the chlorine. So how long should I boil the water the day before to rid the water of the chorine?

It's easier to add a Camden tablet an hour before brewing, I think.
Jeff Gladish, Tampa (989.3, 175.1 Apparent Rennarian)
Homebrewing since 1990
AHA member since 1991, now a lifetime member
BJCP judge since 1995

Offline dmtaylor

  • Brewmaster
  • *****
  • Posts: 774
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #2 on: August 31, 2013, 02:38:48 PM »
I agree, Campden is safer and easier.  There are actually two types of chlorination and boiling will only work on hypochlorite, not chloramine.  Campden removes both hypochlorite and chloramine instantly and you only need 1/4 tablet to treat 5 gallons.
Dave

"This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption. Let us give praise to our Maker, and glory to His bounty, by learning about... BEER!" - Friar Tuck (Robin Hood - Prince of Thieves)

Offline klickitat jim

  • I spend way too much time on the AHA forum
  • ********
  • Posts: 2680
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #3 on: August 31, 2013, 10:15:28 PM »
Chlorine boil point is 29°F
Maybe a C rest at 30°?
Joke
Obviously, some things ain't that easy

Offline mabrungard

  • Senior Brewmaster
  • ******
  • Posts: 1104
    • View Profile
    • Bru'n Water
Re: How long to boil to rid chlorine?
« Reply #4 on: September 01, 2013, 05:55:49 AM »
AJ has an article that shows how long it takes to dechlorinate via boiling: http://hbd.org/ajdelange/Brewing_articles/BT_Chlorine.pdf

I suggest that unless you need to boil the water to reduce alkalinity too, campden tablets are a far better choice.  Proper dosing will not appreciably change your water profile or leave sulfites in the water.  Another dechlorination option is filtering the water through an activated carbon filter.  You must do this at a flow rate of under 1 gpm when using the big 10" undersink filters.  You would have to flow far slower if using a smaller filter.
Martin B
Carmel, IN

BJCP National
Foam Blowers of Indiana (FBI)

Brewing Water Information at:
https://sites.google.com/site/brunwater/

Like Bru'n Water on Facebook for occasional discussions on brewing water and Bru'n Water

Offline ynotbrusum

  • Senior Brewmaster
  • ******
  • Posts: 1004
  • Da mihi sis cerevisiam.
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #5 on: September 01, 2013, 07:51:51 AM »
AJ has an article that shows how long it takes to dechlorinate via boiling: http://hbd.org/ajdelange/Brewing_articles/BT_Chlorine.pdf

I suggest that unless you need to boil the water to reduce alkalinity too, campden tablets are a far better choice.  Proper dosing will not appreciably change your water profile or leave sulfites in the water.  Another dechlorination option is filtering the water through an activated carbon filter.  You must do this at a flow rate of under 1 gpm when using the big 10" undersink filters.  You would have to flow far slower if using a smaller filter.

I can't wait for the Water book to come out - I was not aware that boiling changes alkalinity - is it caused by the water losing minerals to steam?  It would seem to concentrate things at first glance...I am considering an RO system for my house, but my well water is so hard that I fear I will be changing filters constantly.  I wish that chlorine were my only issue, but out here in the country, you take what you can get.
Hodge Garage Brewing: "Brew with a glad heart!"

Offline mabrungard

  • Senior Brewmaster
  • ******
  • Posts: 1104
    • View Profile
    • Bru'n Water
Re: How long to boil to rid chlorine?
« Reply #6 on: September 01, 2013, 02:27:24 PM »
Boiling reduces alkalinity in water with high temporary hardness by driving off dissolved CO2.  Read more about it here: http://www.homebrewersassociation.org/forum/index.php?topic=5792.0
Martin B
Carmel, IN

BJCP National
Foam Blowers of Indiana (FBI)

Brewing Water Information at:
https://sites.google.com/site/brunwater/

Like Bru'n Water on Facebook for occasional discussions on brewing water and Bru'n Water

Offline beerlord

  • Cellarman
  • **
  • Posts: 27
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #7 on: September 01, 2013, 02:35:32 PM »
My water board has 3 homebrewers that work there and they tell me by the time the water gets to me, the chlorine in it is pretty much not enough to worry about but suggested I use a campden tablet for the chloramine.
They also said it would be a good idea to let my water sit out over night and much of it will dissipate.  I've done that for over a year and have no problems related to water. I always use 5.2 stabilizer as well.

Offline mabrungard

  • Senior Brewmaster
  • ******
  • Posts: 1104
    • View Profile
    • Bru'n Water
Re: How long to boil to rid chlorine?
« Reply #8 on: September 01, 2013, 03:12:02 PM »
My water board has 3 homebrewers that work there and they tell me by the time the water gets to me, the chlorine in it is pretty much not enough to worry about but suggested I use a campden tablet for the chloramine.
They also said it would be a good idea to let my water sit out over night and much of it will dissipate.  I've done that for over a year and have no problems related to water. I always use 5.2 stabilizer as well.

It's good you are careful with the dechlorination.  It takes incredibly little of chlorine or chloramine to produce perceptible chlorophenols in beer.  The levels that your water board tells you not to worry about are FAR more than needed to screw up beer flavor. 

Good luck with the 5.2. 
Martin B
Carmel, IN

BJCP National
Foam Blowers of Indiana (FBI)

Brewing Water Information at:
https://sites.google.com/site/brunwater/

Like Bru'n Water on Facebook for occasional discussions on brewing water and Bru'n Water

Offline dmtaylor

  • Brewmaster
  • *****
  • Posts: 774
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #9 on: September 01, 2013, 04:02:52 PM »
Good luck with the 5.2.

Ha ha ha ha ha ha... (some would say "LOL!")
Dave

"This is grain, which any fool can eat, but for which the Lord intended a more divine means of consumption. Let us give praise to our Maker, and glory to His bounty, by learning about... BEER!" - Friar Tuck (Robin Hood - Prince of Thieves)

Offline denny

  • Administrator
  • I must live here
  • *****
  • Posts: 11696
  • Noti OR [1991.4, 287.6deg] AR
    • View Profile
    • Dennybrew
Re: How long to boil to rid chlorine?
« Reply #10 on: September 02, 2013, 08:36:34 AM »
It's good you are careful with the dechlorination.  It takes incredibly little of chlorine or chloramine to produce perceptible chlorophenols in beer.  The levels that your water board tells you not to worry about are FAR more than needed to screw up beer flavor. 

Good luck with the 5.2.

Very diplomatic, Martin.  I'll be a bit more blunt...lose the 5.2!  It seldom works and give the beer a strange flavor.  This is my experience and that of many others.  As AJ said on another forum, the people who say 5.2 works are those who don't actually check the pH.  Try at least a couple batches without it and compare.
Life begins at 60.....1.060, that is!

www.dennybrew.com

The best, sharpest, funniest, weirdest and most knowledgable minds in home brewing contribute on the AHA forum. - Alewyfe

Offline kgs

  • Brewmaster
  • *****
  • Posts: 754
  • San Francisco, CA
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #11 on: September 02, 2013, 09:49:55 AM »
With the long weekend I thought I would try using my city water to brew, I usually use RO and add salts, but our city water is pretty good for brewing except for the chlorine. So how long should I boil the water the day before to rid the water of the chorine?

It's easier to add a Camden tablet an hour before brewing, I think.

My campden tablets came without instructions. Should they really be added an hour before brewing?

K.G. Schneider
AHA Member

Offline mabrungard

  • Senior Brewmaster
  • ******
  • Posts: 1104
    • View Profile
    • Bru'n Water
Re: How long to boil to rid chlorine?
« Reply #12 on: September 02, 2013, 02:53:29 PM »
Karen,

Campden tablets react almost instantly with chlorine compounds.  There is no need to wait an hour.  A couple of minutes to make sure they are dissolved is all the time necessary. 
Martin B
Carmel, IN

BJCP National
Foam Blowers of Indiana (FBI)

Brewing Water Information at:
https://sites.google.com/site/brunwater/

Like Bru'n Water on Facebook for occasional discussions on brewing water and Bru'n Water

Offline theDarkSide

  • Brewmaster General
  • *******
  • Posts: 2077
  • Derry, NH
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #13 on: September 03, 2013, 05:48:41 AM »
This may be overly simplistic, but with Chlorine can't you set the water out the night before and it would dissipate? 

I know that's not the case with chloramine which is why I thought municipalities started using it instead of chlorine.

I have chloramine in my public water system, so I use campden tablets.

Sergeant - BNArmy Member
AHA Member
Seacoast Homebrew Club Member
https://www.facebook.com/SeacoastHomebrewClub
Stephen M.
------------------------------------------------

Online mtnrockhopper

  • I spend way too much time on the AHA forum
  • ********
  • Posts: 2902
  • Delaware
    • View Profile
Re: How long to boil to rid chlorine?
« Reply #14 on: September 03, 2013, 06:58:53 AM »
Chlorine boil point is 29°F
Maybe a C rest at 30°?
Joke
Obviously, some things ain't that easy
Water's boiling point is 212F, yet there is still water in the kettle after boiling for over an hour.  ;D
Jimmy K

Delmarva United Homebrewers - President by inverse coup when the old president ousted himself.
AHA Member since 2006
BJCP: B0958