WLP004 Irish Ale Yeast
Liquid Ale yeast from White Labs.
Lab
White Labs· Ale · Liquid · WLP004
White Labs· Ale · Liquid · WLP004Specs
Attenuation
69–74%
The share of sugars the yeast ferments out. Higher attenuation means a drier, stronger beer.
Optimal temp
18–20°C
64–68°F
The range where this strain ferments cleanly, without throwing off-flavors. Most brewers pitch near the low end.
Flocculation
Med-high
How readily the yeast clumps together and drops clear once fermentation winds down.
Alcohol tolerance
≈10% ABV
The rough ABV ceiling where the yeast stresses out and stops fermenting.
Genetic traits
Phenolics
POF−
Ferments clean
Phenolically clean (POF-negative). No clove or spice, so malt, esters, and hops come through unmasked. The norm for American and British ales and most lagers.
Diastatic
STA-1−
Not diastatic
Does not carry the STA1 (diastaticus) gene. It attenuates normally, with no diastaticus over-attenuation or gushing risk.
Same strain, other labs
Usually used in
Blonde AleBrown AleCiderDry MeadEnglish BitterEnglish IPAPorterRed AleScotch AleStoutSweet Mead
Standard for these styles
Styles where WLP004 Irish Ale Yeast is a standard pick — from the corpus, not the guidelines.
Common questions
- What is the WLP004 Irish Ale Yeast equivalent?
- Irish Ale, A10 Darkness, OYL-005 Irish Ale, and 1084 Irish Ale — the same strain from other labs, the Irish Ale (1084) strain.
- What is WLP004 Irish Ale Yeast's attenuation?
- 69–74% apparent attenuation.
- What temperature should I ferment WLP004 Irish Ale Yeast at?
- 18–20°C is the recommended range.
- What beer styles is WLP004 Irish Ale Yeast good for?
- Blonde Ale, Brown Ale, Cider, Dry Mead, English Bitter, English IPA, Porter, Red Ale, Scotch Ale, Stout, and Sweet Mead.
Brew with WLP004 Irish Ale Yeast
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