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General Category => Yeast and Fermentation => Topic started by: gmac on January 15, 2014, 03:18:34 PM

Title: Hydrating US-05
Post by: gmac on January 15, 2014, 03:18:34 PM
I have a couple packets of this that I'm going to use for a brew on Saturday.  My neighbour wants to make a light coloured but higher alcohol beer for his 21 yr old brothers B-day (which is no big deal here where the drinking age is 19).
I'm gonna do a 10 gal batch using:
20 lbs Pils
5 lbs Minute Rice
1 lb White table sugar.
Should run about 1.072.  This is NOT my choice but I'm doing a favour for a friend.

I'm gonna split the brew in 1/2 with 5 gals getting a big pitch of WLP007 and I have the US-05 that I was gonna try in the other half.  Should I hydrate the yeast or just pitch both packets dry.  I would like to hydrate but is it as easy as pitching the yeast onto some distilled water?  Please let me know what you think would be best route for 5 gals of 1.072 wort with US-05.
Thanks
Title: Re: Hydrating US-05
Post by: Jimmy K on January 15, 2014, 03:24:46 PM
It is easy to rehydrate. Sprinkle dry yeast onto 10 times the amount of water by weight (11g yeast into 110g water, which is 110mL, which is almost 1/2 cup. Water should be 90-100F. Let sit for 15 minutes. Stir into a slurry and pitch. If there is a huge temperature difference between the yeast and wort you might want to temper the yeast by adding small amounts of wort.
Title: Re: Hydrating US-05
Post by: Stevie on January 15, 2014, 03:25:54 PM
I do both rehydrated and not rehydrated. When I rehydrate I just microwave filtered water for a few minutes and cover with plastic wrap. Wait an hour and add yeast.

Step by step instructions were recently posted on the aha main page.
Title: Re: Hydrating US-05
Post by: hopfenundmalz on January 15, 2014, 03:31:49 PM
It is easy to rehydrate. Sprinkle dry yeast onto 10 times the amount of water by weight (11g yeast into 110g water, which is 110mL, which is almost 1/2 cup. Water should be 90-100F. Let sit for 15 minutes. Stir into a slurry and pitch. If there is a huge temperature difference between the yeast and wort you might want to temper the yeast by adding small amounts of wort.

Or a little go-ferm.
Title: Re: Hydrating US-05
Post by: reverseapachemaster on January 15, 2014, 03:39:18 PM
There is no magic. Just add the yeast to a clean water source.
Title: Re: Hydrating US-05
Post by: bigchicken on January 15, 2014, 07:19:32 PM
There is no magic. Just add the yeast to a clean water source.
+1
Just rehydrate while cleaning, chilling, or any other end of the brewing process. Cover with a little plastic wrap or foil and pitch when ready within an hour or so. Not sure how long it can sit, but I go up to an hour at times.
Title: Re: Hydrating US-05
Post by: erockrph on January 15, 2014, 07:38:51 PM
I vote for sprinkle without hydrating. I've tried both ways, and my sprinkle batches are every bit as good as my hydrated ones. I've stopped hydrating for simplicity's sake.
Title: Re: Hydrating US-05
Post by: In The Sand on January 15, 2014, 08:08:40 PM
I vote for sprinkle without hydrating. I've tried both ways, and my sprinkle batches are every bit as good as my hydrated ones. I've stopped hydrating for simplicity's sake.

+1  Although now I've started using liquid yeast, making starters, and rinsing and reusing yeast...so simplicity went out the window a while back.
Title: Re: Hydrating US-05
Post by: Joe Sr. on January 15, 2014, 09:22:52 PM
I vote for sprinkle without hydrating. I've tried both ways, and my sprinkle batches are every bit as good as my hydrated ones. I've stopped hydrating for simplicity's sake.

Hydrating is pretty damn simple, IME.  I typically hydrate, but I've done it both ways with good results.

It's easy enough to set aside a small glass of water with the yeast in it while the wort cools.
Title: Re: Hydrating US-05
Post by: klickitat jim on January 15, 2014, 10:46:15 PM
According to Zainasheff about half of your dry yeast will die if you sprinkle dry without rehydration.
Title: Re: Hydrating US-05
Post by: morticaixavier on January 15, 2014, 10:55:39 PM
According to Zainasheff about half of your dry yeast will die if you sprinkle dry without rehydration.

That's the common wisdom but there are so many instances of people testing side by side with sensory analysis and not tasting any difference it begins to make one wonder.

That being said it is an awfully easy procedure and hardly seems like a big deal to do.
Title: Re: Hydrating US-05
Post by: HoosierBrew on January 15, 2014, 11:29:51 PM
I agree it is an easy step to take to rehydrate. But, thing is, the first couple dozen times I used it I just sprinkled on top - I had good results, good attenuation, etc. So there was a baseline to compare to. The next several times I rehydrated and could literally tell no difference in attenuation, lag time, or beer quality. Undoubtedly on a cellular level it make sense to rehydrate, no arguments. Just can't look back and pick a time when I saw any difference whatsoever, or I'd damn sure be doing it . Having said all this, I prefer 1056 when there's time to make a starter. I use S-05 for spur of the moment American styles brewing.
Title: Re: Hydrating US-05
Post by: Stevie on January 15, 2014, 11:33:54 PM
I remember JZ saying that higher gravity worts were particularly harder on the yeast if you don't rehydrate. Think of it as drinking ice cream through a straw versus a milk shake.
Title: Re: Hydrating US-05
Post by: erockrph on January 15, 2014, 11:45:39 PM
According to Zainasheff about half of your dry yeast will die if you sprinkle dry without rehydration.

It's a good thing I'm making beer and not yeast!

I definitely trust Jamil when it comes to yeast, but in the end it's the beer that really matters, not how much yeast I've grown. For the beers I've made I just haven't noticed any Ill effects from sprinkling.

Regardless, I think everyone should try it for themselves. There's nothing wrong with rehydrating, I've just got no need for it myself.
Title: Re: Hydrating US-05
Post by: theDarkSide on January 16, 2014, 01:43:39 AM
According to Zainasheff about half of your dry yeast will die if you sprinkle dry without rehydration.
Which is why I add 2 packets.  Still cheaper than one vial of liquid.  I usually only do it when I'm feeling lazy, so pretty much all the time. :-D

Sent from my Transformer Prime TF201 using Tapatalk 2
Title: Re: Hydrating US-05
Post by: majorvices on January 16, 2014, 12:19:34 PM
According to Zainasheff about half of your dry yeast will die if you sprinkle dry without rehydration.

According to my experience, which is worth at least as much as anything JZ has ever said, you won't notice any difference between sprinkling the yeast directly on the wort and rehydrating. ;)

I also agree with tDS - just add a little more yeast if it freaks you out. Or rehydrate if you really feel you need too. But side by side batches have proven to me that there is no difference in flavor - at least not on beers under 1.065.
Title: Re: Hydrating US-05
Post by: klickitat jim on January 16, 2014, 12:50:47 PM
Good to know. Seems like somethings are not as fact as they seem.
Title: Re: Hydrating US-05
Post by: majorvices on January 16, 2014, 02:31:47 PM
Fwiw I mean no disrespect to jamil. He has been a disseminator of great information. But if you have the means to experiment, it's always best to find out for yourself. It may be better to rehydrate in higher gravity beers (though even there I have not had bad experienced sprinkling directly on wort and maybe over pitching about 10-20 %) but side by side on IPAs 1.065 (ish) I have not seen any noticeable difference.
Title: Re: Hydrating US-05
Post by: denny on January 16, 2014, 04:48:43 PM
Fwiw I mean no disrespect to jamil. He has been a disseminator of great information. But if you have the means to experiment, it's always best to find out for yourself.

Gold Star AWARD!!!

(http://www.baseqbrisbane.com/Star_20Gold_20Compress.gif)
Title: Re: Hydrating US-05
Post by: majorvices on January 16, 2014, 04:53:52 PM
Awwwe shucks! That made my day.
Title: Re: Hydrating US-05
Post by: denny on January 16, 2014, 04:55:44 PM
Awwwe shucks! That made my day.

Feel free to print it out and put it up in the brewery!  ;)
Title: Re: Hydrating US-05
Post by: Pinski on January 16, 2014, 06:12:36 PM
I like to rehydrate if I'm using dry yeast on wort > 1.060.
Title: Re: Hydrating US-05
Post by: gmac on January 16, 2014, 10:13:03 PM
Thanks all.
Because the wort is gonna be >1.065, I'm gonna re-hydrate 2 packets and pitch them both.  Again, this is not my choice of beer or methods but I don't have time to get new yeast ordered (would usually use 1.056 instead) so I'm gonna use my emergency dry yeast.
I'm also gonna do a back up 5 gals with a good pitch of WLP007 but I want the remainder of the WLP007 for some English IPA that is on the schedule for the next day.
Title: Re: Hydrating US-05
Post by: Jeff M on January 17, 2014, 02:32:00 AM
http://www.fermentis.com/brewing/craftbrewing/tips-tricks/
Title: Re: Hydrating US-05
Post by: ynotbrusum on January 19, 2014, 01:14:14 PM
http://www.fermentis.com/brewing/craftbrewing/tips-tricks/

Interestingly, on page 8 it expressly states that rehydration may be done with water or wort!  Secondly, none of the recipes on the site use S-23 - Denny would be happy to hear that!
Title: Re: Hydrating US-05
Post by: euge on January 19, 2014, 01:59:54 PM
I've always felt that my rehydrated yeast had shorter lag times. What really helped when rehydrating was using boiled tap water and not purified, RO or distilled.

I'm inclined to go with the pro brewer's experience tho. ;)
Title: Re: Hydrating US-05
Post by: el_capitan on January 19, 2014, 04:10:22 PM
I also saw that none of the recipes use K-97.  I've never even heard of that yeast.  The only character info on it is "fruity."  Anybody ever used that one?

This page (http://www.fermentis.com/wp-content/uploads/2012/02/SFA_K97.pdf) indicates that it's good for Belgians or wheat beers with low esters.  So that seems contradictory to me.  Fruity, with low esters?  Weird.
Title: Re: Hydrating US-05
Post by: denny on January 19, 2014, 05:11:33 PM
I've always felt that my rehydrated yeast had shorter lag times. What really helped when rehydrating was using boiled tap water and not purified, RO or distilled.

I'm inclined to go with the pro brewer's experience tho. ;)

I'm not a pro brewer...I'll go with my OWN experience!
Title: Re: Hydrating US-05
Post by: euge on January 19, 2014, 07:11:51 PM
Well I'll go by my own but I don't brew everyday, but the sum of my experience is very small compared to the major's.
Title: Re: Hydrating US-05
Post by: gmac on January 20, 2014, 03:45:52 AM
Well, it's hydrated in boiled tap water and pitched into a 1.070 wort so we will gain some experience now.
Title: Re: Hydrating US-05
Post by: Jimmy K on January 21, 2014, 02:20:46 PM
Well, it's hydrated in boiled tap water and pitched into a 1.070 wort so we will gain some experience now.

ex.pe.ri.ence
/ikˈspi(ə)rēəns/

noun
   (1) Knowledge acquired just after you needed it.
Title: Re: Hydrating US-05
Post by: klickitat jim on January 21, 2014, 02:36:16 PM
Also a degree earned at the University of Hard Knocks. I have a PhD in that, or PhE as the case may be.