White Labs Yeast | WLP004 Irish Ale | PurePitch® Next Generation
Product details
| Management number | 253678828 | Release Date | 2026/10/24 | List Price | CA$6.00 | Model Number | 253678828 | ||
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Brew authentic Irish stouts and malt-forward British ales with White Labs WLP004 Irish Ale Yeast | PurePitch® Next Generation, a premium liquid yeast sourced from one of the world's oldest stout-producing breweries. Known for its clean, dry finish and ability to enhance roasted malt flavors, WLP004 is an excellent choice for creating balanced beers with rich coffee, chocolate, and caramel character. Each 70 mL PurePitch® Next Generation pouch contains approximately 150 billion cells, providing enough healthy yeast to ferment a standard 5-gallon batch without requiring a starter for most moderate-gravity beers. WLP004 is ideal for brewing Irish Dry Stout, Porter, Brown Ale, Red Ale, English Bitter, and Scotch Ale.
WLP004 promotes roasted malt expression while finishing clean and dry, allowing specialty malts to shine without excessive sweetness. Light fruity esters help round out the flavor profile, creating smooth, drinkable beers with balanced complexity. Its medium to high flocculation also produces excellent clarity, making it well suited for traditional British and Irish beer styles that benefit from a bright finish.
This liquid ale yeast features medium to high flocculation, 69–74% attenuation, STA1 negative status, and an alcohol tolerance of 5–10% ABV. It performs best between 65–68°F (18–20°C) and is packaged in White Labs' PurePitch® Next Generation pouch containing approximately 150 billion cells for reliable pitching rates and consistent fermentation performance.
For best results, store refrigerated between 33–38°F and do not freeze. Pitch into well-oxygenated wort and ferment within the recommended temperature range. One pouch is suitable for most standard-strength 5-gallon batches, while a yeast starter is recommended for higher-gravity beers or older yeast. Proper fermentation practices and healthy pitching rates will help maximize attenuation, clarity, and roasted malt expression.
Produced to White Labs' professional fermentation standards, WLP004 Irish Ale Yeast | PurePitch® Next Generation is trusted by homebrewers and commercial breweries for producing clean, malt-driven ales with exceptional balance. Its healthy cell count, dependable fermentation performance, and classic Irish character make it an outstanding choice for brewing traditional stouts, porters, and other flavorful British-style ales.
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