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Author Topic: Double Mash  (Read 18251 times)

Offline klickitat jim

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Double Mash
« on: January 18, 2018, 02:05:49 pm »
Brewing my Imperial Stout today. A couple of you posted interest in how it goes, so I will do that here. I will do 1st Mash Brix, 2nd Mash Brix, and OG to the fermentor. Heating strike now...
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Offline Robert

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Re: Double Mash
« Reply #1 on: January 18, 2018, 02:38:05 pm »
Edge of my seat, got the snacks, ready for live coverage of the big event!
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Rob Stein
Akron, Ohio

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Offline klickitat jim

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Re: Double Mash
« Reply #2 on: January 18, 2018, 02:54:16 pm »
150f mash temp, hit it right on (verified by digital)

14.5 lbs in 12 gallons. That was fun doughing-in! Pretty much max capacity. After 10 min and two stirs I pulled a sample for pH which read 5.4 but the flash blanked it in the photo... It said 5.3 right after the photo. Close enough, my meter probe is old and my calibration fluids are too.

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Offline klickitat jim

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Re: Double Mash
« Reply #3 on: January 18, 2018, 03:17:05 pm »
After 40 min I stired and started recirc-vorlauf. Pull a sample and got 10 brix. According to Kai's chart it should be 9.9 brix for 3.3qts per lb.

So far so good (two separate samples both read 10. I don't trust refractometers...)


« Last Edit: January 18, 2018, 03:20:51 pm by klickitat jim »
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Offline klickitat jim

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Re: Double Mash
« Reply #4 on: January 18, 2018, 03:37:54 pm »
After runoff the first mash, then back to mash tun, according to my stick I lost one gallon. Temp dropped to 142 in the transfer. Bringing it back up to strike temp for the remaining 14 lbs.

By the way it didn't occur to me until just now to remeasure and recalculate strike... Probably important step or you'll undershoot.
« Last Edit: January 18, 2018, 03:39:48 pm by klickitat jim »
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Offline klickitat jim

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Re: Double Mash
« Reply #5 on: January 18, 2018, 03:47:16 pm »
Second mash temp nailed! Don't forget second mash acid addition... I almost did. I would also suggest stirring or recirculation when heating the first runnings to strike temp.
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Offline klickitat jim

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Re: Double Mash
« Reply #6 on: January 18, 2018, 04:35:35 pm »
45 min into second mash, 5.4ph and 20 brix! It's magic... tempted to do a third mash and go for 30 brix lol
« Last Edit: January 18, 2018, 04:39:28 pm by klickitat jim »
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Offline klickitat jim

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Re: Double Mash
« Reply #7 on: January 18, 2018, 05:12:53 pm »
Eyeballing starting boil volume, I didn't need 12 gallons. Looks like I only list two gallons to absorption. Guess I'll do a two hour boil and see what I get
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Offline Robert

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Re: Double Mash
« Reply #8 on: January 18, 2018, 05:17:46 pm »
Quote from: klickitat jim on January 18, 2018, 05:12:53 pm
Eyeballing starting boil volume, I didn't need 12 gallons. Looks like I only list two gallons to absorption. Guess I'll do a two hour boil and see what I get
Starting boil at what Brix?
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Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Offline klickitat jim

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Re: Double Mash
« Reply #9 on: January 18, 2018, 05:34:59 pm »
20... so it's looking like I'll end up with 6.5 gallons of 1.120ish

If I boil that long.
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Offline Robert

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Re: Double Mash
« Reply #10 on: January 18, 2018, 05:46:14 pm »
Quote from: klickitat jim on January 18, 2018, 05:34:59 pm
20... so it's looking like I'll end up with 6.5 gallons of 1.120ish

If I boil that long.
Wow, that double mash really works!  Was that better brewhouse yield than your guesstimate?
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Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Offline klickitat jim

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Re: Double Mash
« Reply #11 on: January 18, 2018, 05:52:26 pm »
Way better. I get about 65% brewhouse in my normal 1.060ish no sparge beers. This one looks to be more like 70%. I was figuring on getting 60%
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Offline Robert

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Re: Double Mash
« Reply #12 on: January 18, 2018, 05:54:18 pm »
Who'd a' thunk.
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Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.

Offline klickitat jim

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Re: Double Mash
« Reply #13 on: January 18, 2018, 05:57:01 pm »
Ya, so I'm adding some hops lol. Need more IBUs I think. And it looks to be out of style. 12abv is all they allow, but this one looks to be more like 12.8
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Offline Robert

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Re: Double Mash
« Reply #14 on: January 18, 2018, 06:05:20 pm »
Quote from: klickitat jim on January 18, 2018, 05:57:01 pm
Ya, so I'm adding some hops lol. Need more IBUs I think. And it looks to be out of style. 12abv is all they allow, but this one looks to be more like 12.8
Screw the style police.  Yours is just too good for 'em!
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Rob Stein
Akron, Ohio

I'd rather have questions I can't answer than answers I can't question.
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