Omega Yeast | OYL-004 West Coast Ale I | Double Pitch | 225 Billion Cells

Omega Yeast | OYL-004 West Coast Ale I | Double Pitch | 225 Billion Cells

$14.99
Omega OYL-004 West Coast Ale I delivers a clean, highly attenuative fermentation profile ideal for American IPAs, pale ales, and hop-forward styles.
  • Clean, neutral flavor profile with light citrus character
  • 150 mL pack contains 225 billion cells, treats 5 gallons
Ice pack:

Ice Packs / Shipping:For best results, we strongly recommend adding an ice pack to your liquid yeast order. Ice packs do not guarantee that yeast will arrive cold, but will keep yeast colder for longer during transit. We can not replace yeast that arrives warm. In warm weather months, we highly encourage choosing dry yeast. Liquid yeast is final sale. As a live, perishable ingredient that requires refrigeration, we are unable to accept returns or exchanges once an order has left our warehouse.

Storage: Store in the fridge (33–38ºF). Do not freeze. Pitch cold - do not warm to room temp prior to pitching. Use within 4 months for direct pitching. For pouches older than 4 months, or that are warm, use a yeast starter to boost cell count.

Fermentation Temp Range
Each yeast strain has a temperature range where it performs best. Lagers require cooler temps, while Kveik yeasts can ferment in extreme heat. Maintaining the proper fermentation temperature for each yeast strain is crucial its health. Matching a yeast's ideal range to your environment (or your ability to control temp) is key to getting clean, consistent results.
Scale from 30°-120°F
Product Analysis
This typical analysis is not to be construed as product specification. Typical analysis represents average values, not to be considered as guarantees, expressed or implied, nor as a condition of sale.

Yeast Format, Liquid
Yeast Style, Ale
Flocculation, Medium Low
Attenuation, 73~80%
Diastatic, No
Phenolic, No
Fermentation Temperature Range, 60~73°F
Alcohol Tolerance, 11%

OYL-004 West Coast Ale I is Omega’s interpretation of the classic Chico strain, prized for its clean fermentation and versatility across American beer styles. It produces low ester character with a subtle citrus note when fermented at cooler temperatures.

With attenuation ranging from 73–80% and alcohol tolerance up to 11%, this strain creates dry finishes and excellent clarity. Medium-low flocculation allows hop character to shine while maintaining balanced structure. Ferments reliably between 60–73°F.

OYL-004 is an ideal choice for clean American ale styles where hop and malt balance take center stage.

Ideal for:

• American IPA
• American Pale Ale
• Cream Ale
• American Stout

• Store refrigerated at 33–38°F
• Do not freeze
• Pitch cold into well-oxygenated wort
• Ferment between 60–73°F
• Use within 4 months for best viability
• Consider a yeast starter for older pouches or high-gravity beers

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Omega Yeast | OYL-004 West Coast Ale I | Double Pitch | 225 Billion Cells
From $14.99

Frequently Asked Questions

Yes. OYL-004 is Omega’s version of the classic Chico-style yeast, known for its clean and neutral fermentation profile.

Each 150 mL pouch contains approximately 225 billion cells, designed to treat 5 gallons of wort.

No. It produces a clean, neutral profile with low esters and a subtle citrus note when fermented cooler.

For standard gravity 5-gallon batches, a starter is often unnecessary. For higher gravity beers or older yeast, a starter is recommended.

OYL-004 is ideal for American IPAs, pale ales, cream ales, and other clean American ale styles.

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