WLP518 Opshaug Farmhouse Yeast - Kveik - PurePitch® Next Generation BB: 26/09/2024

WLP518 Opshaug Farmhouse Yeast – Kveik – PurePitch® Next Generation BB: 26/09/2024

£11.63

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This strain was isolated and purified from a mixed culture from the Opshaug family farm in Norway. This strain was originally used in the 1990s to produce several kveik-style beers. It is a clean fermenting yeast and has tolerated temperatures up to 91°F (33°C) while finishing fermentation within 48-50 hours.

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Description

Sourced from our friend Lars Marius Garshol of Lillestrøm, this strain was isolated and purified from a mixed culture from the Opshaug family farm in Norway. This strain was originally used in the 1990s to produce several kveik-style beers. It is a clean fermenting yeast and has tolerated temperatures up to 91°F (33°C) while finishing fermentation within 48-50 hours.

This is a pure culture kveik-style yeast. 

Harald Opshaug in Stranda, western Norway, got this kveik from another farmhouse brewer further up the valley in the mid-90s. Harald has used several kveik strains, but this one he calls “the good sort.”

Originally Harald brewed raw ale with juniper branches and kveik like other kornøl brewers in the area. Eventually, he got exposed to modern brewing theory, which teaches that this is all wrong. So he started boiling the wort and switched from the kveik to Nottingham Ale yeast. “That yeast is all right in its way, but it takes until well over midnight before anything happens,” he said. Harald was used to this kveik, which would make the hat of foam rise out of the fermentor before he had finished boiling and cleaning his second kettle.

He switched yeasts because he didn’t dare use the kveik any more, after having learned that this was wrong. But at the same time, he couldn’t bear to throw it away, so he has been keeping it alive by reviving it now and then, and then drying it again.

He pitched at 23-24°C (73-75°F), but the yeast can handle at least 33°C (91°F). He would harvest yeast from the top after 30 hours, and the beer would be finished after 48-50 hours.

 

Attenuation: 70.00-80.00

Flocculation: Medium to High

Optimum Fermentation Temperature: 77.00-86.00

Alcohol Tolerance: Medium – High (8 – 12%)

Sourced from our friend Lars Marius Garshol, this Kveik strain was isolated from a mixed culture which belonged to Harald Opshaug, a farmhouse brewer in Stranda, Norway. This strain was originally used in the 1990s to produce several kornøl-style beers. It is a clean fermenting yeast and has tolerated temperatures up to 95°F (35°C) while finishing fermentation within three to four days. The hop-forward, clean characteristics of this strain make it ideal for IPAs and pale ales.

ATTENUATION :

69% – 80%

FLOCCULATION :

Medium to High

ALCOHOL TOLERANCE :

Very High (15+%)

FERMENTATION TEMPERATURE :

77° – 95° F
25° – 35° C

STA1 :

Negative

Suggested styles for WLP518 Opshaug Farmhouse Yeast – Kveik
  • American IPA
  • Blonde Ale
  • Double IPA
  • Hazy/Juicy IPA
  • Pale Ale
  • Porter
  • Red Ale
  • Stout

 

We stock the largest range of yeast for home brewers in Europe, ensuring we have something for every beer style you could want to brew. Be sure to check it out here

Be sure to check out the White Labs Pitch rate calculator to ensure you have the right volume of yeast

Our goal in creating PurePitch® Next Generation for Homebrewers was to provide a product that will allow hobbyists and small scale brewers a convenient and modular package to pitch a consistent 7.5 million cells/mL; a commercially recommended pitching rate for standard ale ranges. The same package has proven to be an optimization to PurePitch® for larger professional brewers for over a year.

Now with more yeast, get a foolproof fermentation without a starter. Following a commercially recommended pitching rate allowing you to pitch like the pros!

We are the industry leader in quality with 38 quality checkpoints for every single strain. The same quality and care you trust, for both homebrew and professional yeast. You can be assured that all products released from White Labs have passed rigorous tests to ensure the highest viability and purity at the time of QC release.

With 79 Core strains and countless more in the Vault, we have has a strain for every beer, whether you’re using a trusty workhorse like WLP001 California Ale Yeast® or experimenting with something new and rare in the Vault.  Find these new strains at your local homebrew store carrying White Labs, or order direct from us!

Just twist the cap & pitch!

All of our people are passionate about what we do – a combination of Departments from Sales & Marketing, Customer Service, Microbiology, Production, Packaging, White Labs Brewing Co, White Labs Analytical Laboratory, Education, and R&D are dedicated to making the best yeast possible. It’s easy to love what you do in this industry which is why so many of our team members enjoy homebrewing, just as we did when we started in 1995. We encourage our teams to homebrew and build that love of brewing, the way it was when our company was founded.

PurePitch® Next Generation for Homebrewers FAQ

Is PurePitch® Next Generation larger than your previous package?

Yes!  Now with more yeast, you get double the pitch. PurePitch® Next Generation is designed to pitch at a rate of 7.5 million cells/mL per 5 gallons/20 liters, a commercially recommended pitching rate for standard ale ranges.

Do I need to make a starter?

No! For any standard ale, you will get the perfect fermentation by pitching directly – NO STARTER NEEDED.

What if I am brewing something that is not a “standard ale” – how do I know how much yeast I need for my batch?

Each pouch of PurePitch® Next Generation provides general quantity recommendations per 5gal/20L of wort.

​Our online calculator at yeastman.com allows you to see the exact recommendation for you using your volume, temperature, and gravity. Allowing you to customize the pitch rate to anything you want, larger or smaller!

What does 7.5 million cells/mL mean?

When pitching 1 pouch of PurePitch® Next Generation into 5 gal/20L of wort, there will be 7.5 million cells per milliliter.  This is a commercially recommended pitching rate, allowing you to pitch like the pros.

What is the shelf-life of PurePitch® Next Generation?

The shelf-life is 6 months from the QC-release date labeled on the package.  As a result of the proprietary dual-layer film, yeast are able to remain in excellent condition with high viability and performance.

Why change to a new version of PurePitch® ?

Our number one request from the homebrewing community has been for more yeast! Next Generation has been developed in response to brewing styles and fermentation techniques requiring more yeast than ever before, as well as the desire for a more optimal yeast package without the need for a starter.

Additional information

Weight 0.75 kg
Country of Origin US
HS Code 2102101090

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