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In Focus: Irish Ale Yeast

WLP004 Irish Ale Yeast

This is the yeast from one of the oldest stout producing breweries in the world. It produces a slight hint of diacetyl, balanced by a light fruitiness and slight dry crispness. Great for Irish ales, stouts, porters, browns, reds and a very interesting pale ale. 
Attenuation: 69-74%
Flocculation: Medium to High
Optimum Fermentation Temperature: 65-68°F
Alcohol Tolerance:  Medium-High

MiniFerment data:
What is MiniFerment? White Labs yeast strains were tested using the same wort in its proprietary MiniFerment process. The process simulates large-scale brewing. To learn more about MiniFerment click here. To learn more about understanding the data, click here.

As-is Diacetyl Total Diacetyl As-is 2,3-Pentanedione Total 2,3-Pentanedione Ethanol Acetaldehyde Ethyl Acetate Isoamyl Acetate 1-Propanol Isoamyl Alcohol
21.87ppb 87.81ppb N/A 13.1ppb 4.89%ABV 16.35ppm 25.53ppm 0.615 24.105ppm 186.27ppm

Final Gravity: 68 °F
Hours to get to 50 percent attenuation: N/A

Audio:

Listen to audio about WLP004 
Chris White, president of White Labs, discusses the company's strains in these audio tapes.
(The download may take a few minutes depending on one's computer)

Reviews:
Write your own review

" ... definitely using this again!"
By: opticman
Date: April 27, 2009
Beer Brewed: Sweet Stout
Comments: First Stout I have brewed and this is an amazing yeast! With the 1 Liter starter I made, lag time was only 3 hours! This yeast flocculated very well, and the finished product is far superior than any commercial Stout I have had. I am very impressed with WLP004 Irish Ale yeast, definitely using this again!

"This is gonna be tasty!"
By: jjames17407
Date: July 27, 2008
Beer Brewed: Irish Red, Irish Stout
Comments: I've used dozens of yeast strains that White Labs produces, but the WLP004 Irish Ale yeast is fastly becoming my choice for all Ale and Stout homebrewing! I've never seen a strain of yeast take off as quickly as WLP004, my latest Irish Red was pitched at 2 p.m. on brew day and was already blowing off at 7 a.m. the next morning! This is gonna be tasty!

"The beer took a 1st place"
By: Michael A.
Date: May 5, 2008
Beer Brewed: Strong Scotch Ale /Wee Heavy
Comments: This yeast produced a malty, full bodied ale. The beer ended up around 10-11% ABV with some (not much) residual sweetness. The finished beer took a 1st place ribbon in a hombrew contest.

" ... smells delicious while fermenting"
By: Jesse Cronce
Date: Feb. 25, 2008
Beer Brewed: Oatmeal Stout, Old Ale
Comments: Irish ale yeast imparts a delicious fruity character to beer, which works very well with stouts, porters, and my most recent beer an Old Ale. The fruitiness pulls the residual sweetness of brown sugar together with a hoppy spicy bite for a very balanced brew. Also, IAY smells delicious while fermenting. No elephant farts!

" ... the yeast was robust"
By: TJ Vitolo
Date: Sept. 27, 2007
Beer Brewed: Irish Red
Comments: I used this yeast to make an Irish Red as part of a wedding gift. Having gone out of my realm of brewing wheats and in the midst of the summer, I was not sure I could keep the temperature low and I was right. Although the temperature slightly exceeded (+2 or 3 degrees) the recommended range, the yeast was robust and yielded a beer that was a hit. I gave the beer sufficient time to age and work out diacetyl and in the end it the beer was true to style, and true to the yeast description having a hint of diacetyl, light fruitiness and a dry finish even though it had a malty profile.

"Great Irish style stout"
By: Anonymous
Date: July 13, 2007
Beer Brewed: Oatmeal stouts
Comments: Great yeast to create nice dry stout. For years I have tried other dry and liquid yeasts, but this one definitely will give you a great Irish style stout. Works great in Imperial and Oatmeal Stouts as well. Nice yeast!

" ... Every beer turned out great"
By: David Dameron
Date: May 31, 2007
Beer Brewed: All Grain. All Styles.
Comments: I used this yeast for the first time in an all-grain Irish Stout kit I purchased last year. I was so impressed with the results that I tried it in one of my home made Pale Ale recipes. To make a long story short, I brewed about 20 batches of beer last year. Everything from Pale Ale to Red to Nut Brown to Porter to Stout. I used this yeast in every beer and every beer turned out great. This is definately a great yeast for all-grain brewing.

" ... Produced an excellent stout"
By: Matthew Wood
Date: May 21, 2007
Beer Brewed: porter, stout
Comments: This yeast produced an excellent stout as well as the best porter I have ever tasted. It produced a very complex and pleasing flavor in each, and mellowed well and noticeably week to week even after 6 months in the bottle.

" ... Hint of cherry"
By: Gointomexico
Date: Nov. 18, 2006
Beer Brewed: Export tout, dry stout, brown ale
Comments: Some malt flavor, hint of cherry. Smoke flavor goes away in time.

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