4.5 Litre BIAB yeast pitch rate ??

Discussion in 'Beginners Brewing Forum' started by JockMcBrew, Sep 22, 2020.

  1. JockMcBrew

    JockMcBrew New Member

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    Hi folks,

    As av been learning a fair few facts wi the help oh the guys on here for ma 5 litre BIAB batches, more questions pop up in ma heed.

    I hav done a few 4.5 litre batches in the past and with each would would buy a small sache oh the required Mangrove Jacks dry yeast, until now I have always just used the whole 10g pack.. and it appeared ti dae the job, but in recent reading have learned a specific pitch rate can very much improve the fermentation and the batch.

    Came across the pitch calculator on here but having a fair bit trouble understanding it

    Can anybody assist me in understanding this or enlighten me on an easy go to rule. the batch I plan to brew the morn is a porter using mangrove jack imperial ale yeast with a desired og of 1.055

    any help would be much appreciated
     
  2. Nosybear

    Nosybear Well-Known Member

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    A full sachet is technically an overpitch. I've never used the pitch rate calculator on such a small batch, less than 3 gallons isn't worth my time. I hand pitched a whole sachet into a gallon of extract wort with no ill effects. It's hard to damage beer by overpitching so I'd recommend pitch half a sachet and call it good.
     
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  3. Bubba Wade

    Bubba Wade Well-Known Member

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    Yeast is one of the ingredients where the amount is not an exact science.

    From a practical standpoint, most yeast packets have enough yeast for a 20 liter batch of normal gravity. I brew 10 liter batches and routinely use a half packet. Why? It’s cheaper. I’ve used a whole packet on 10 liter batches and have found no difference in pitching a whole or half packet.

    Having said that, under pitching can stress the yeast. But a half sachet for your 5 liter batches will work just fine.
     
  4. JockMcBrew

    JockMcBrew New Member

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    Thanks again guys, will go for the half sachet, just starting this brew the noo

    Slainte
     
  5. JGaspar

    JGaspar New Member

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    I always use 1/4 of a pk in a 5L batch. Remember to hydrate it first.
     

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