SafAle S-33
Dry Ale yeast from Fermentis.
Lab
Fermentis· Ale · Dry · S-33
Fermentis· Ale · Dry · S-33Specs
Attenuation
68–72%
The share of sugars the yeast ferments out. Higher attenuation means a drier, stronger beer.
Optimal temp
12–25°C
54–77°F
The range where this strain ferments cleanly, without throwing off-flavors. Most brewers pitch near the low end.
Alcohol tolerance
≈11% 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.
Same strain, other labs
Potential substitutes for SafAle S-33
Common questions
- What is the SafAle S-33 equivalent?
- M10 Workhorse Yeast — the same strain from another lab, the S-33 (Edme Ale) strain.
- What is SafAle S-33's attenuation?
- 68–72% apparent attenuation.
- What temperature should I ferment SafAle S-33 at?
- 12–25°C is the recommended range.
- What can I substitute for SafAle S-33?
- WLP005 British Ale Yeast, 1187 Ringwood Ale, WLP002 English Ale Yeast, and 1968 London ESB Ale.
Brew with SafAle S-33
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