White Labs Yeast - American Lager
WLP840
This yeast is used to produce American style lagers. Dry and clean with a very slight apple fruitiness. Sulfur and diacetyl production is minimal.
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 60-70F and cool to 48-52F 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 45-48F and let it naturally rise to 48-52F. Hold your fermentation at 48-52F 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.
Attenuation: 75-80%
Flocculation: Medium
Fermentation Temperature: 50-55F
For Tips & Tricks click here.
NOTE: IT IS RECOMMENDED THAT LIQUID YEAST BE SHIPPED VIA 2-DAY AIR.
MANY CUSTOMERS ORDER YEAST SEPERATELY FROM OTHER ITEMS TO REDUCE SHIPPING COSTS. ICE PACKS ARE AVAILABLE AND RECOMMENDED DURING SUMMER.
IT IS ALWAYS ADVISABLE TO PROOF YOUR YEAST (see "YEAST STARTERS") AND/OR HAVE DRY BACKUP YEAST.
IF YOU THINK YOUR YEAST HAS BEEN DAMAGED IN TRANSIT OR ARE MAKING A HIGH GRAVITY BEER, PLEASE MAKE A YEAST STARTER BEFORE PITCHING. WE CAN REPLACE YEAST THAT DOES NOT START, BUT CANNOT REPLACE A FAILED BATCH.
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