Author Topic: repitching lager yeast slurry  (Read 2111 times)

Offline brewinhard

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repitching lager yeast slurry
« on: January 14, 2016, 06:44:01 PM »
Providing that proper sanitation is up to par, how many lager yeast generations can one repitch as slurry from the primary? 4? 6?

Offline denny

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Re: repitching lager yeast slurry
« Reply #1 on: January 14, 2016, 07:06:56 PM »
Only you know that....it just depends.  But I'd say 4 is easily doable.
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Offline blatz

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Re: repitching lager yeast slurry
« Reply #2 on: January 14, 2016, 07:27:12 PM »
Only you know that....it just depends.  But I'd say 4 is easily doable.

+1.  I generally stop at 5, if I get that high which isn't often.  not because I've experienced anything bad happen, but I know that I'm getting near the 'edge' and its time to start up anew. 

keep in mind you can branch off your slurry to extend the generations.  i.e. brew a batch of helles, of which you use some but not all of the slurry in a marzen the next brew and use the remainder the next weekend in a Vienna, and so on.

pros that I have spoken with often repitch 15-20 times before repitching, but their conditions are different than most homebrewers.

TheProfessor I believe uses an ale strain that's been repitched for decades.
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Offline atodd

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Re: repitching lager yeast slurry
« Reply #3 on: January 14, 2016, 09:06:48 PM »
I am in my third generation of Wyeast 2124 and it is performing well.

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Offline mainebrewer

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Re: repitching lager yeast slurry
« Reply #4 on: January 14, 2016, 09:35:09 PM »
I've not gone beyond 5 re-pitches but have not had any issues with that number.
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Offline brewinhard

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Re: repitching lager yeast slurry
« Reply #5 on: January 15, 2016, 01:50:51 PM »
I figured it was probably between 4 and 6 at best. I will only go out to four on this one with WY 2308 as it is in its second generation and performing well for me. Thank you all!

Offline Wort-H.O.G.

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Re: repitching lager yeast slurry
« Reply #6 on: January 15, 2016, 02:03:24 PM »
repitching slurry 4-5 times?   after that are you rebuilding from small sample in starter, or getting new pouch of the yeast?
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Offline davidgzach

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Re: repitching lager yeast slurry
« Reply #7 on: January 15, 2016, 04:58:46 PM »
I've re-pitched up to 7 times with no ill effects.  I try to perform a good wash to minimize the trub and dead cells.  If it's been longer than a couple of months, I'll build a hefty starter and then transfer it at high Krausen to a new vessel to finish out.   
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Offline denny

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Re: repitching lager yeast slurry
« Reply #8 on: January 15, 2016, 05:16:27 PM »
I've re-pitched up to 7 times with no ill effects.  I try to perform a good wash to minimize the trub and dead cells.  If it's been longer than a couple of months, I'll build a hefty starter and then transfer it at high Krausen to a new vessel to finish out.

Have you tried not "washing"? (What you're probably doing is "rinsing").  I have found no advantage to it at all and have stopped doing it.
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Offline brewinhard

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Re: repitching lager yeast slurry
« Reply #9 on: January 15, 2016, 06:01:17 PM »
repitching slurry 4-5 times?   after that are you rebuilding from small sample in starter, or getting new pouch of the yeast?

Yes, literally repitching 1-2 day old saved slurry from primary to next batch primary. After that, I will stop using that strain and try a new strain with a new pouch and start all over. I usually don't brew the same "style" of beer in succession like this, but I am currently on a lager run with the colder temps making it easier to chill the wort down. 

Offline davidgzach

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Re: repitching lager yeast slurry
« Reply #10 on: January 15, 2016, 06:09:41 PM »
I've re-pitched up to 7 times with no ill effects.  I try to perform a good wash to minimize the trub and dead cells.  If it's been longer than a couple of months, I'll build a hefty starter and then transfer it at high Krausen to a new vessel to finish out.

Have you tried not "washing"? (What you're probably doing is "rinsing").  I have found no advantage to it at all and have stopped doing it.

Denny, Mr. Semantics.  I find I get pretty good separation and it's become part of my process which works quite well.  I'm happy with the results so if it ain't broke....
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Offline denny

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Re: repitching lager yeast slurry
« Reply #11 on: January 15, 2016, 06:25:50 PM »
Denny, Mr. Semantics.  I find I get pretty good separation and it's become part of my process which works quite well.  I'm happy with the results so if it ain't broke....

Oh, I understand that!  But laziness always drives me to understand if something is really necessary and really produces better results.
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repitching lager yeast slurry
« Reply #12 on: January 15, 2016, 06:41:28 PM »
Denny, Mr. Semantics.  I find I get pretty good separation and it's become part of my process which works quite well.  I'm happy with the results so if it ain't broke....

Oh, I understand that!  But laziness always drives me to understand if something is really necessary and really produces better results.

Laziness is a virtue when used correctly Denny!


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Offline davidgzach

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Re: repitching lager yeast slurry
« Reply #13 on: January 15, 2016, 10:37:31 PM »
Denny, Mr. Semantics.  I find I get pretty good separation and it's become part of my process which works quite well.  I'm happy with the results so if it ain't broke....

Oh, I understand that!  But laziness always drives me to understand if something is really necessary and really produces better results.

Laziness is a virtue when used correctly Denny!


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Offline leejoreilly

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Re: repitching lager yeast slurry
« Reply #14 on: January 16, 2016, 02:23:28 PM »
Denny, Mr. Semantics.  I find I get pretty good separation and it's become part of my process which works quite well.  I'm happy with the results so if it ain't broke....

Oh, I understand that!  But laziness always drives me to understand if something is really necessary and really produces better results.

Laziness is a virtue when used correctly Denny!


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It's not "laziness", it's "conservation of energy".