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Mash tun advice

Discussion in 'DIY Projects' started by Ghizo, 29/12/15.

 

  1. Ghizo

    Well-Known Member

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    Posted 29/12/15
    Just starting all grain, I have a 30l boiler, I only want enough to fill a keg each brew, so 19l finished. About 20l in fermenter
    What size mash tun is ideal? I was thinking 30l would be good? Less dead space = less temp loss right?
     
  2. TheWiggman

    Haters' gonna hate

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    Posted 29/12/15
    It's all relative of course, but generally the mash tun volume is less than or equal to your boiler volume. Where you will run into trouble is -
    • Extended boils (for something like an EBW, which may require a 2.5h boil). You need more initial volume in the kettle to allow for boiloff
    • Big beers with higher OG. These are less efficient so you'll struggle to fit enough grain and liquid in your mash tun
    • Boilover
    Like all things in AG brewing, there are ways to get around this like double-mashing or changing your grain:liquor ratio.

    I have a 36l mash tun and a 50l kettle. When doing a 23l batch of 7% ABV beer I get about 3/4 of the way filling my mash tun and have plenty of room in the kettle. In your case, I think 30l would be fine for the mash tun. You'll be pushing your luck sometimes with a 30l boiler though.
     
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  3. Bribie G

    Adjunct Professor

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    Posted 29/12/15
    Another trick to avoid boilovers is to brew over gravity then "liquor back" in the fermenter.
    I see that the Poms do a lot of that as until recently their Electric boilers were only about 25L.
    You might lose a bit of efficiency but an extra half kilo of grain or whatever isn't a problem.
    Seeing as you have a boiler why not go BIAB?
     
  4. Ducatiboy stu

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    Posted 29/12/15
    26ltr esky is the perfect sizde for what you want to do
     

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