Yet another Bru'n Water vs thread. Please help - results dramatic

[Silver_Is_Money]

An interesting observation when using Riffe's formula Briess 2-Row calculates to 5.723 pH and Briess Crystal 60L to 5.678 pH.

Are you confident that you are applying the formula correctly? My data is directly from Briess.

 

[ScrewyBrewer]

Are you confident that you are applying the formula correctly? My data is directly from Briess.

I thought I had can you take a look?

 

[Big Monk]

I thought I had can you take a look?

This is why it's always good to have an input for DI pH. In this case, no matter what the actual DI pH is, Riffe is assuming 5.72.

A better version would be:

DI pH (Input) - 0.0337 * (f *A)

An even better version would be:

Weighted DI pH (Input) (all malts) - 0.0337 * (f * A)

 

[ajdelange]

A Congress mash uses distilled water and follows a particular mash program. What I am referring to here is usually called a "test mash". In it you use a small portion of your grist and mash it with the water you intend to use holding until the pH is stable.

 

[ScrewyBrewer]

This is why it's always good to have an input for DI pH. In this case, no matter what the actual DI pH is, Riffe is assuming 5.72.

A better version would be:

DI pH (Input) - 0.0337 * (f *A)

An even better version would be:

Weighted DI pH (Input) (all malts) - 0.0337 * (f * A)

Agreed. I never understood why the assumption is 5.72 for pH. This may explain why his predictions always seem to be higher than other Gen I formulas. As the library of grain DIpH values continues to grow I'll adopt the Gen II approach.

 

[Silver_Is_Money]

I thought I had can you take a look?

For 60L crystal the spreadsheet you linked gives me 4.641 pH. That's lower than the lowest Briess DipH data I have for their brand of 60L crystal (which spans a range from 4.65 to 4.85), but certainly not what you reported above. Briess Pilsner is at 5.83(ish). Their Vienna is at or about 5.65(ish). And their 2-Row Brewers is at or about 5.57(ish).

 

[ScrewyBrewer]

For 60L crystal the spreadsheet you linked gives me 4.641 pH. That's lower than the lowest Briess DipH data I have for their brand of 60L crystal (which spans a range from 4.65 to 4.85), but certainly not what you reported above. Briess Pilsner is at 5.83(ish). Their Vienna is at or about 5.65(ish). And their 2-Row Brewers is at or about 5.57(ish).

You're correct Larry I am horrible at multi-tasking and got things confused in the process. I got 4.641 for crystal 60L too. Which isn't that far off from the lower end of the Briess pH range of 4.65 to 4.85.