Skip to content
BREWING.IT/ yeast

1272 American Ale II

Liquid Ale yeast from Wyeast.

LabWyeast· Ale · Liquid · 1272

Specs

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
≈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

American Ale II (1272)
1272 = American Ale = A15 = OYL-009

Potential substitutes for 1272 American Ale II

Usually used in

Blonde AlePale AleIPAStrong AleBrown Ale & Porter

Standard for these styles

Styles where 1272 American Ale II is a standard pick — from the corpus, not the guidelines.

Common questions

What is the 1272 American Ale II equivalent?
American Ale, A15 Independence, and OYL-009 West Coast Ale II — the same strain from other labs, the American Ale II (1272) strain.
What is 1272 American Ale II's attenuation?
72–76% apparent attenuation.
What temperature should I ferment 1272 American Ale II at?
16–22°C is the recommended range.
What beer styles is 1272 American Ale II good for?
Blonde Ale, Pale Ale, IPA, Strong Ale, and Brown Ale & Porter.
What can I substitute for 1272 American Ale II?
LalBrew BRY-97 American West Coast Ale (similar temperature range), M44 US West Coast Yeast (similar attenuation, similar temperature range), and WLP019 California IV Ale Yeast (liquid option).
Brew with 1272 American Ale II
Build a recipe