Grandfather - very liquid mash

A forum to discuss one pot automated brewing systems.
Post Reply
Tomp
Steady Drinker
Posts: 87
Joined: Sat May 27, 2017 8:01 pm

Grandfather - very liquid mash

Post by Tomp » Tue Sep 19, 2017 4:04 pm

Ran my 1st brew with the grandfather last weekend.

Used their online calculator (as it sends the steps etc. to the controller) to sort out the mash liquor (I would have used BeerSmith but this is only on my iPad and won't output a beer.xml file) and it suggested 21 litres of mash liquor for a 6.5Kg with 11 for the sparge. When mixed in, it seemed very runny. Not at all the normal 'porridge' consistency I'm used to.

My normal calculation would have been around 18 litres (with about 3 litres given over to dead space) based on the GW calculations of around 2.3 litres per Kg.

Does anyone else think this seems a lot of water for a mash?
It started with kits to save money and now look........!!!

All grain only
Grainfather
SS conical fermenter
A patient wife....

Fil
Telling imaginary friend stories
Posts: 5213
Joined: Sun Oct 16, 2011 1:49 pm
Location: Cowley, Oxford

Re: Grandfather - very liquid mash

Post by Fil » Tue Sep 19, 2017 6:06 pm

What does the formula in th G/F manual provide?

Thats more liquor than ive had in my G/F for a mash, but i dont belive i have mashed more than 5kg of grain either..
edit - 18l without running up the shed n checking my notes is a familar volume?? so + 3l for circa + 2kg of grain seems reasonable..

Dont forget when you have enclosed the grain within the basket its - give the lid a wee bit off oomff ;) the grain/liquor ratio within the basket will be inline with a stiffer mash in a more conventional tun.


edit #2 a spray of starsan lubes the silicone seal so its slips down rather than pulls off when shoved down..
ist update for months n months..
Fermnting: not a lot..
Conditioning: nowt
Maturing: Challenger smash, and a kit lager
Drinking: dry one minikeg left in the store
Coming Soon Lots planned for the near future nowt for the immediate :(

chefgage
Piss Artist
Posts: 273
Joined: Mon Mar 16, 2015 10:37 am

Re: Grandfather - very liquid mash

Post by chefgage » Wed Sep 20, 2017 8:25 am

Tomp wrote:
Tue Sep 19, 2017 4:04 pm
Ran my 1st brew with the grandfather last weekend.

Used their online calculator (as it sends the steps etc. to the controller) to sort out the mash liquor (I would have used BeerSmith but this is only on my iPad and won't output a beer.xml file) and it suggested 21 litres of mash liquor for a 6.5Kg with 11 for the sparge. When mixed in, it seemed very runny. Not at all the normal 'porridge' consistency I'm used to.

My normal calculation would have been around 18 litres (with about 3 litres given over to dead space) based on the GW calculations of around 2.3 litres per Kg.

Does anyone else think this seems a lot of water for a mash?
I have just done one myself. 5kg of grain asked for 17 litres mash water and 15 litres sparge water. So your 21 litres for 6.5kg is right. Are you sure you did not accidently add extra on top of the 21 litres. The 17 litres i added certainly gave the porridge consistancy. This was calculated using the online recipe calculator as you did.

User avatar
IPA
Under the Table
Posts: 1066
Joined: Wed Dec 07, 2011 9:29 am
Location: France Gascony

Re: Grandfather - very liquid mash

Post by IPA » Wed Sep 20, 2017 9:14 am

With a BM I use 55 litres for 8 kilos of grain. In fact I use 55 litres no matter what size of grain bill. Always get around 85% efficiency.
"You're not drunk if you can lie on the floor without holding on." Dean Martin

Post Reply

Return to “Braumeister, Grainfather and other One-Pot Brewing Systems”

Who is online

Users browsing this forum: Google Adsense [Bot] and 2 guests