WLP840 American Lager - White Labs Yeast

WLP840 American Lager - White Labs Yeast

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This yeast is used to make American style lagers. Dry and clean with a very slight apple fruitiness. Sulfur and diacetyl production is minimal.

  • Optimum Fermentation Temp: 50–55°F
  • Attenuation: 75–80%
  • Flocculation: Medium
  • Alcohol Tolerance: Medium (5–10%)
  • Cell Count: 100+ Billion

Brewing Tip: We Recommend you make a yeast starter for all lagers. Because of the cold environment you will need about 4 times as much yeast to successfully ferment a lager. If you don't have a yeast starter pitch 2-4 vials at 60-70°F and cool to 48-52°F within 12-18 hours. To ferment lagers like the German's and Czech's make an active starter of 2000ml per 5 gallons. Pitch at 45-48°F and let it naturally rise to 48-52°F. Hold your fermentation at 48-52°F for 4-6 weeks in the primary. A diacetyl rest is recommended after the last week of fermentation. Raise to 55-58F for 3-5days and crash to 40F. It is normal if lager fermentation takes 3-4 days to show any sign of krausen after pitching yeast.

Use this yeast in: American Lager, American Light Lager, Bohemian Pilsner, Marzen, Munchen Helles, Munchner Dunkel, Munchner Dunkel, Schwarzbier, Vienna Lager.

Please Note: For best results we Always recommend ordering an Ice Pack with your liquid yeast. Ice Packs can be found below in the "You might Also Need" section.

Please Note: When choosing an ice pack option beware that the liquid yeast will not arrive cold even when shipped together. Ice packs and insulated mailing options are designed to keep the yeast colder for longer during shipment, but they will not ensure that your yeast arrives cold. We will not replace liquid yeast that arrives warm. During warmer months we strongly recommend you choose dry yeast.


Item # WLP840
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.14 LBS
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Why did you choose this?
MoreFlavor Store
It was easy to find the COA information
Adam Semitekol on Feb 23, 2023
Looking for Pilsner yeast for home brew
Charles O on Nov 14, 2022
It was easy to find the COA information
Adam Semitekol on Feb 23, 2023
Brandon H on Jan 26, 2023
Looking for Pilsner yeast for home brew
Charles O on Nov 14, 2022
For a brew
Charles F on Oct 19, 2022
Need it for a recipe
Michael A on Jun 15, 2022
Makes dry clean beer
Jack S on Jun 14, 2022
i like this yeast
Mark on Apr 23, 2022
i have had good luck with white labs yeast
justin a l on Mar 7, 2022
Because my recipe told me to pick it.
Brandon on Feb 7, 2022
Making an American lager
Mallie on Jun 15, 2021
See above above above
Terrell H on May 6, 2021
Philjr99 on Apr 7, 2021
Good yeast
Gene M on Aug 27, 2020
For beer style
Marc F on Jun 6, 2020
First time with White Labs
John M on Jan 27, 2020
I feel the White Labs American Lager yeast is very versatile and is a great choice for all my light lager brews
Valued C on Jan 21, 2020
to make an ale
Dane Jack on Apr 26, 2019
For that American lite lager
John Anderson on Mar 21, 2019
BRIAN A C on May 17, 2018
Used it before; White Labs is very reliable, love this yeast.
Wayne W on Apr 30, 2018
Brandon H on Jan 26, 2023
For a brew
Charles F on Oct 19, 2022

5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Great stuff. I never make a starter under .055 og.
August 25, 2022
over 3 years ago
Rated 5 out of 5
Nice yeast
I use this yeast regularly, one vial per 5 gallons, for excellent low gravity lager.
May 27, 2015