Grainfather reduced pipe work

[Marcus Roper]

Hi There,
Has anyone used the grainfather reduced pipe work? Can it only achieve 10ltrs of wert? I’m worried about losses that I may end up with only 8ltrs.
I have 12ltr corny kegs. So should I use standard pipe work and do 13 to 15ltrs and factor In losses?
Please help M

 

[Norfolk79]

I’ve got it, but I only use it when I’ve got less than approx 4.2kg of grain for the mash, albeit for a lower abv beer with 22l or so into the fermenter. I haven’t used it for smaller batches.

There’s usually about 1.5 - 2l of wastage at the bottom of the GF, depending on the amount of hops, so you probably want to aim for about 16 litres or so pre 60 minute boil

 

[Marcus Roper]

Hi There,
Thanks so much for the help. So should I aim for 16ltrs to get 12ltrs

 

[Norfolk79]

Give it take I usually have 28l pre boil to get around 22l into the fermenter. It’s usually a little more than 22. The actual GF software on their website is usually pretty accurate with amounts of water if you specify what you’re aiming for in the fermenter.

Edit: Just checked my last 2 brews and it was 27l pre boil for 22l into the fermenter. My calcs in my original post were right

 

[Slid]

Give it take I usually have 28l pre boil to get around 22l into the fermenter. It’s usually a little more than 22. The actual GF software on their website is usually pretty accurate with amounts of water if you specify what you’re aiming for in the fermenter.

Edit: Just checked my last 2 brews and it was 27l pre boil for 22l into the fermenter. My calcs in my original post were right

I would agree with the assertion that you will lose 5L in a GF. 30L in the GF (a couple of these litres can be in a pot on the stove) at the start of the boil for 25L in the FV.

After 94 brews on the GF, I am still a novice, though. Just interested in having something to drink I suppose.