A09 Pub
Liquid Ale yeast from Imperial Yeast.
Lab
Imperial Yeast· Ale · Liquid · A09
Imperial Yeast· Ale · Liquid · A09Specs
Attenuation
69–74%
The share of sugars the yeast ferments out. Higher attenuation means a drier, stronger beer.
Optimal temp
18–21°C
64–70°F
The range where this strain ferments cleanly, without throwing off-flavors. Most brewers pitch near the low end.
Flocculation
Very 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.
Potential substitutes for A09 Pub
Usually used in
Extra Special BitterEnglish IPAEnglish MildBitterOld AleWinter Seasonal BeerAmerican Pale AleStoutIrish DryBrown PorterIrish Red AleOatmealBritish Strong AleEnglish Barleywine+16 more
Common questions
- What is A09 Pub's attenuation?
- 69–74% apparent attenuation.
- What temperature should I ferment A09 Pub at?
- 18–21°C is the recommended range.
- What beer styles is A09 Pub good for?
- Extra Special Bitter, English IPA, English Mild, Bitter, Old Ale, Winter Seasonal Beer, American Pale Ale, Stout, Irish Dry, Brown Porter, Irish Red Ale, Stout, Oatmeal, British Strong Ale, English Barleywine, Cream Ale, American Wheat Beer, Blonde Ale, California Common, American Amber Ale, American Brown Ale, American IPA, Black IPA, Hazy IPA, Red Ale, American Pale Ale, Robust Porter, American Stout, Winter Seasonal Beer, Imperial IPA, American Barleywine, Imperial Stout, and American Strong Ale & Wheatwine.
- What can I substitute for A09 Pub?
- WLP002 English Ale Yeast, English Ale I, 1968 London ESB Ale, and OYL-016 Extra Special (formerly British Ale VIII).
Brew with A09 Pub
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