A15 Independence
Liquid Ale yeast from Imperial Yeast.
Lab
Imperial Yeast· Ale · Liquid · A15
Imperial Yeast· Ale · Liquid · A15Specs
Attenuation
72–76%
The share of sugars the yeast ferments out. Higher attenuation means a drier, stronger beer.
Optimal temp
16–22°C
61–72°F
The range where this strain ferments cleanly, without throwing off-flavors. Most brewers pitch near the low end.
Flocculation
Medium
How readily the yeast clumps together and drops clear once fermentation winds down.
Alcohol tolerance
≈12% 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
Potential substitutes for A15 Independence
Usually used in
American IPAAmerican Pale AleBlonde AleStoutSweetOatmealCream AleCalifornia CommonAmerican Amber AleAmerican Brown AleBlack IPAHazy IPARed IPARed Ale+24 more
Common questions
- What is the A15 Independence equivalent?
- American Ale, OYL-009 West Coast Ale II, and 1272 American Ale II — the same strain from other labs, the American Ale II (1272) strain.
- What is A15 Independence's attenuation?
- 72–76% apparent attenuation.
- What temperature should I ferment A15 Independence at?
- 16–22°C is the recommended range.
- What beer styles is A15 Independence good for?
- American IPA, American Pale Ale, Blonde Ale, Stout, Sweet, Stout, Oatmeal, Cream Ale, California Common, American Amber Ale, American Brown Ale, Black IPA, Hazy IPA, Red IPA, Red Ale, Robust Porter, American Stout, Winter Seasonal Beer, Imperial IPA, American Barleywine, Irish Red Ale, Imperial Stout, American Strong Ale, Wheatwine, English Mild, Extra Special Bitter, Bitter, Pale Ale, Stout, Irish Dry, Brown Porter, English IPA, Scottish Ale, Stout, Tropical, British Strong Ale, English Barleywine, Old Ale, Stout, Foreign Extra, Wee Heavy, and American Wheat Beer & White IPA.
- What can I substitute for A15 Independence?
- WLP008 East Coast Ale Yeast, OYL-032 East Coast Ale, WLP019 California IV Ale Yeast, and WLP051 California Ale V Yeast.
Brew with A15 Independence
Build a recipe