Boiling to Remove Temporary Hardness.

[Braufessor]

I am planning on boiling to remove temporary hardness from my water for a brew tomorrow.

Couple Questions......

1.) My water is 250-300 Hardness, almost all of which is temporary hardness. My water is VERY similar to Munich water.

2.) When doing this...... bring water to a boil..... boil for 10 minutes. Should I agitate as it comes up to boil? Should I chill the water after I boil it? Basically..... what do I do after I boil it, and when?

3.) Mineral and acid additions after I have Moved water from boil vessel (off of sediment) I assume??

Any other thoughts/advice?

Thanks

 

[daveMN]

1. I have similarly hard water. I also preboil.
2. I boil for about 20 minutes, but 10 should be enough. There's plenty of agitation with a rolling boil. I transfer to my HLT almost right away and let it sit overnight (I boil my water the night before). I don't chill.
3. I add minerals to the preboil water to make sure I have enough Calcium to precipitate the carbonate. I have a calculator to determine my post-boil mineral levels, which I'd be glad to share. Got some feedback from AJ on my calcs. Essentially, you should have about 1 meq/l (50 ppm) after preboiling your water. I test my boiled water with a LaMotte kit and get between 50 and 70 ppm (as CaCO3).
Good luck!

 

[Braufessor]

1. I have similarly hard water. I also preboil.
2. I boil for about 20 minutes, but 10 should be enough. There's plenty of agitation with a rolling boil. I transfer to my HLT almost right away and let it sit overnight (I boil my water the night before). I don't chill.
3. I add minerals to the preboil water to make sure I have enough Calcium to precipitate the carbonate. I have a calculator to determine my post-boil mineral levels, which I'd be glad to share. Got some feedback from AJ on my calcs. Essentially, you should have about 1 meq/l (50 ppm) after preboiling your water. I test my boiled water with a LaMotte kit and get between 50 and 70 ppm (as CaCO3).
Good luck!

If my preboil water is very similar to the munich water in B'run water..... would I be correct to assume my post boil water would be in the ball park of the B'run water profile for Munich Boiled?? My Calcium (pre boil) is 65.

 

[daveMN]

We have really similar water. My gut feeling is that boiling should get you around the same numbers as the Munch Boiled profile. I add a little excess calcium to get most all the alkalinity out and to get my strike water calcium up to about 50 ppm.
I should clarify what I posted above is that I'm targeting 50 ppm Alkalinity (as CaCO3), or 1 meq/l.

 

[Mer-man]

75% phosphoric acid works nicely