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SafAle S-04

Physical Product · Beer & homebrewing · 16 mentions · 1 subreddit · discussed in r/Homebrewing

Reddit take

Not enough linked mention summaries yet; the source excerpts below are the evidence.

Pros

  • They're hard to fuck up, the temperature is very forgiving if you use a yeast like S-04, and they go down pretty easily.
  • For ales, S-04.
  • Some of the best beers I have ever brewed (out of hundreds) have been with good old simple S-04. It produces beer that is clean and malty and delicious.
  • I’m likely to reach for S-04 before us-05. Old habits die hard. It’s also insanely cheap.
  • I agree that S-04 would be a solid choice.

Cons

  • I did intentionally underpitch S-04 **10-fold** once out of curiosity; it fermented out to the same extent as the regular pitch, lagging behind the regular pitch by 18h. Tasted like shit though (yeasty, it never cleared up… pretty sure t...
  • S-04 won't do a dang thing in combo with lactose and US-05 which has much higher attenuative properties than S-04.
  • I used so4 to finish it off. Came out great.
  • One thought is that it can be somewhat attenuative. If s-04 was less attenuating, that could be a reason to consider it. I would have to check my notes but I seem to recall a-04 tends to finish a little higher for me than kveik.
  • I tried recreating something akin to Old Speckled Hen and used S-04. It did not work well for me being more like unsweetened British tea.

Sentiment

10 positive (63%) · 4 mixed (25%) · 2 negative (13%)

Trust + time weighted score: +45% · raw score 50%

What redditors said (10 of 16)

They're hard to fuck up, the temperature is very forgiving if you use a yeast like S-04, and they go down pretty easily.
positive · u/k****y · r/Homebrewing · comment · Aug 5, 2025 · open on Reddit ↗
For ales, S-04.
positive · u/c****s · r/Homebrewing · comment · Dec 22, 2025 · open on Reddit ↗
I did intentionally underpitch S-04 **10-fold** once out of curiosity; it fermented out to the same extent as the regular pitch, lagging behind the regular pitch by 18h. Tasted like shit though (yeasty, it never cleared up… pretty sure there was a lot of cell death).
negative · u/b****2 · r/Homebrewing · comment · Dec 18, 2025 · open on Reddit ↗
S-04 won't do a dang thing in combo with lactose and US-05 which has much higher attenuative properties than S-04.
negative · u/d****2 · r/Homebrewing · comment · Nov 22, 2025 · open on Reddit ↗
I used so4 to finish it off. Came out great.
mixed · u/C****0 · r/Homebrewing · comment · Nov 21, 2025 · open on Reddit ↗
Some of the best beers I have ever brewed (out of hundreds) have been with good old simple S-04. It produces beer that is clean and malty and delicious.
positive · u/d****2 · r/Homebrewing · comment · Aug 4, 2025 · open on Reddit ↗
I’m likely to reach for S-04 before us-05. Old habits die hard. It’s also insanely cheap.
positive · u/s****9 · r/Homebrewing · comment · Aug 3, 2025 · open on Reddit ↗
One thought is that it can be somewhat attenuative. If s-04 was less attenuating, that could be a reason to consider it. I would have to check my notes but I seem to recall a-04 tends to finish a little higher for me than kveik.
mixed · u/s****9 · r/Homebrewing · comment · Jul 30, 2025 · open on Reddit ↗
I agree that S-04 would be a solid choice.
positive · u/d****2 · r/Homebrewing · comment · Jul 29, 2025 · open on Reddit ↗
I find 04 tastes better after at least a week
positive · u/b****2 · r/Homebrewing · comment · Feb 19, 2025 · open on Reddit ↗

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