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Imperial Yeast | A09 Pub Ale | Beer Yeast | Double Pitch | 200 Billion Cells
IYA09
Imperial Yeast | A09 Pub Ale | Beer Yeast | Double Pitch | 200 Billion Cells
Imperial Yeast | A09 Pub Ale | Beer Yeast | Double Pitch | 200 Billion Cells
 

Imperial Yeast | A09 Pub Ale | Beer Yeast | Double Pitch | 200 Billion Cells

Yeast  
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Description
  • A09 is a beloved and highly flocculent British ale strain. Well suited for a variety of beer styles
  • Produces high levels of esters, making it an excellent choice for when balance between malt and yeast derived esters is necessary
  • Double pitch size with a minimum of 200 billion cells—twice the size of the standard yeast pitch
  • Imperial Yeast is a group of hard-working, fermentation fanatics who provide the brewing industry with the highest quality, most effective yeast possible

A09 Pub is a highly sought after strain that home brewers swear by due to is ability to achieve brilliantly bright ales in a short amount of time. Because Pub is extremely flocculent it will tear through fermentation and drop out of your beer quickly. This strain will produce higher levels of esters than most ale strains. A sufficient diacetyl rest is highly recommended when using A09 Pub.

Attenuation: 69-74%
Flocculation: Very High
Alcohol Tolerance: 10% ABV
Optimum Fermentation Temp: 64-70°F
Cell Count: 200 Billion
Similar Strains: WLP002, WY1968

Please Note: For best results we Always recommend ordering an Ice Pack with your liquid yeast. Ice Packs can be found below in the "You might Also Need" section.

Please Note: When choosing an ice pack option beware that the liquid yeast will not arrive cold even when shipped together. Ice packs and insulated mailing options are designed to keep the yeast colder for longer during shipment, but they will not ensure that your yeast arrives cold. We will not replace liquid yeast that arrives warm. During warmer months we strongly recommend you choose dry yeast.

Item # IYA09
Shipping Eligible for Free Shipping Program
Availability In Stock
Weight 0.37 LBS
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Community Q&A
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Why did you choose this?
MoreFlavor Store
Great yeast
Kevin P on Mar 7, 2023
To brew a "fullers" style ale
Dave Y on Feb 19, 2022
Great yeast
Kevin P on Mar 7, 2023
I was going to get the Wyeast but gotta love the extra hundred billion cells- I usually don't make a starter, never had an issue with these 200bn packs
Sean T on Jul 14, 2022
To brew a "fullers" style ale
Dave Y on Feb 19, 2022
heard good reviews
Michael Patrick F on Feb 2, 2022
Required for a brew recipe.
Kyle H on Jul 14, 2021
Used it a few times for brown ales and porters with great results
DANIEL J E on Feb 5, 2021
Haven't tried it before and brulosophy raves about it
Benjamin F on Jan 29, 2021
I haven't tried Imperial yet
Joshua D on Jul 28, 2020
Excellent experience with the brand. Making Best Bitter
Benjamin B on Jun 13, 2020
Gonna make some beer
Daniel C on Jun 4, 2020
I love the cell counts and the consistency of the product.
Ed F on May 30, 2020
Never tried it before, but like the idea of not needing to make a starter for a high OG beer
Scott S on May 14, 2020
I like organic
Dennis C on May 12, 2020
It is appropriate for the beer that I am brewing. I love using Imperial!
Ed F on Apr 29, 2020
Making an Imperial Ale
Steven L on Mar 27, 2020
don't touch me there
C H on Nov 23, 2019
Well rated, cell count
Steve C on Nov 16, 2019
The Best yeast on the market
Paul S on Sep 6, 2019
Best for ESB
Dave T on Aug 31, 2019
Cell count
michael j on Jul 20, 2019
new to me
George W on Jun 19, 2019
It put me over the top for free shipping.
Keith J on Mar 27, 2019
Used before with great results
jeff san m on Mar 19, 2019
helps make beer
Chris H on Jun 8, 2018
Getting ready to brew some English Ales and this looked good.
Jeff S on Apr 11, 2018
Because I want to try this brand out
Scott C on Mar 9, 2018
Wyeast 1768 is my favorite strain. Been wanting to check this one out
Sam G. F on Mar 7, 2018
I was going to get the Wyeast but gotta love the extra hundred billion cells- I usually don't make a starter, never had an issue with these 200bn packs
Sean T on Jul 14, 2022
heard good reviews
Michael Patrick F on Feb 2, 2022
Reviews
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4.2 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
7
2
1
2
0
Rated 5 out of 5
I used this yeast in the More Beer Oatmeal Stout recipe and it’s delicious! One thing I like about this yeast (besides the flavor) is that it comes with enough viable yeast cells that I don’t need to make a starter (unless you have a high gravity beer) and you pitch it directly into your cooled wort without needing to smack a pack and you don’t have to worry about taking it out of the refrigerator ahead of as you pitch it cold.
February 11, 2022
Purchased
 over 3 years ago
Rated 5 out of 5
Great for those malty brown ales
Used this yeast for a brown ale and it exceeded my expectations.
December 13, 2021
Purchased
 over 3 years ago
Rated 5 out of 5
Worked well as always
February 28, 2021
Purchased
 over 4 years ago
Rated 3 out of 5
Not my bag
The yeast fermented fast and finished nice but, the flavor it imparted is not what I was looking for. I did a split batch with my latest creation of an American porter with the other one getting Flagship. The flavor in the Pub fermented batch has a sharp black licorice flavor that I do not prefer over the Flagship clean and crisp flavored batch. I gave it 3 stars because of only the flavor, I do not like black licorice type sharp twang it has lol but the yeast performed great as it is listed so take this review as a personal flavor review. The beer was fermented at 62°F and raised to 70°F after 4 days where it was completed before cold crashing after the seventh day.
January 21, 2021
Purchased
 over 4 years ago
Rated 2 out of 5
Trouble with yeast during hot season -be careful
Packages arrived "Hot" - very hot. Bag had expanded almost to the point of exploding. This despite my paying extra for two ice packs, along with an insulated bag. The person at More Beer was very polite and suggested I build a yeast starter to determine if the yeast was still viable. Problem is that I buy imperial yeast so I don't have to build a starter. Second problem (and my biggest concern) is that the yeast have been severely Strained and it's not clear that off flavors have not already started to build. Not worth the risk. Suggest people consider your local temperatures when ordering temperature sensitive materials. Along with this shipment was 5 other types of yeast and I think it's all bad.
September 11, 2020
Purchased
 over 4 years ago
Rated 5 out of 5
Crazy Fermentation
I ordered this yeast and had it shipped with two ice packs and in it's own protective package. When it arrived, the ice packs had gone warm and the yeast \was pretty warm as well, which worried me. I put it in the refrig for about 10 days and finally brwed my Imperial Porter. I made a double yeast starter for this yeast in case cells had died in shipment. I oxygenated my wort and added the yeast. It began fermenting 2 hours later and was one of the wildest fermentations I've ever had. Brewed it two days ago and still going like mad. Looking forward to the end product.

PW
August 24, 2020
Purchased
 over 4 years ago
Rated 5 out of 5
Excellent first time experience
First time to use Imperial yeast and it took off in less than 8 hours and finished in 4 days. Will use again!
January 30, 2020
Purchased
 over 5 years ago
Rated 5 out of 5
Good amount
Required a smaller starter than the others. Fermentation started quickly once pitched.
August 9, 2019
Purchased
 over 5 years ago
Rated 5 out of 5
Love It
Use in Low Gravity English ales works great. Fast ferment and easy to harvest.
June 27, 2018
Purchased
 over 7 years ago
Rated 4 out of 5
A Real Workhorse
I have used this yeast at least three times. It is very aggressive, takes off like a race horse, and finishes very quickly. For every beer with this strain, I have done a diacetyl rest, raising the temperature 3-4?_F to take care of the very junior-young-green flavors. This always did the trick.

I would also agree with the other reviewer about the can. The yeast does stick in the can. The best bet is to warm the can up a bit (I know, I think it says pitch cold), give it a good shake, and the pour. Those of you who have had experience with the older White Labs tubes will know how yeast can get a little caked if it is sitting long. I think this yeast is similar, particularly if it has been sitting idle for a few months.
October 18, 2016
 
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