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
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.
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