Preboil volume query

[MikeW]

Still only on my 4th all grain brew, so still learning.
Previous brews have been a 19 litre kit from CML, supplied with excellent instructions.
Now I have bought a Malt Miller 23 Litre True to Style #10 English Porter. The basic instructions supplied do not give a Mash volume or Preboil volume.
The kit has a grain bill of 5.3 kg, so times that by 2.5 gives me a mash of 13.25 litres, all good so far.
Can I assume that 60mins of boiling will reduce the volume by 1 gal (4.54 litres) so there for the pre boil should be 23+4.54 = 27/28 litres?
Just looking for reassurance before I start the brew tomorrow. (Using a BIAB method with an overnight mash)

Cheers

 

[Buffers brewery]

That's a definite maybe from me. Depends on your equipment but it's a good starting position. Just make a note of your start and finish boil volumes and adjust if necessary for subsequent boils. Remember, if your post boil volume is low and SG is high you can liquor back. Good luck.

 

[MashBag]

It's a definite "don't worry about it" from me. Top it up after, just make sure you have accurate measurements marked on the fv.

 

[The Baron]

I think the advice on both posts will get you there

 

[Rodcx500z]

If you have brewfather plug all your numbers in, it will tell you pre boil volume

 

[Keruso]

Still only on my 4th all grain brew, so still learning.
Previous brews have been a 19 litre kit from CML, supplied with excellent instructions.
Now I have bought a Malt Miller 23 Litre True to Style #10 English Porter. The basic instructions supplied do not give a Mash volume or Preboil volume.
The kit has a grain bill of 5.3 kg, so times that by 2.5 gives me a mash of 13.25 litres, all good so far.
Can I assume that 60mins of boiling will reduce the volume by 1 gal (4.54 litres) so there for the pre boil should be 23+4.54 = 27/28 litres?
Just looking for reassurance before I start the brew tomorrow. (Using a BIAB method with an overnight mash)

Cheers

Grainfather calculator says mash 17.8 L, sparge 13.4 L, Preboil is 27 L, but of course that's for the Grainfather system, so will not necessarily be accurate for other systems.

 

[Philthebrewer]

If you have a mashing kettle which will take a big enough volume I would recommend mashing with as much water as possible. So, I would run the calc backwards and say: 23 litres target + 3 litres boil off (say) + 5.5 litres grain absorption - 6 litres sparging = 25.5 litres mashing water.

In my simple world I don't do much calculation and just mash with 25 litres every time (in my Braumeister).

good luck

 

[MashBag]

If you have a mashing kettle which will take a big enough volume I would recommend mashing with as much water as possible. So, I would run the calc backwards and say: 23 litres target + 3 litres boil off (say) + 5.5 litres grain absorption - 6 litres sparging = 25.5 litres mashing water.

In my simple world I don't do much calculation and just mash with 25 litres every time (in my Braumeister).

good luck

Yup me too. Too simple
I do wonder if the BM makes you think on simple terms. A lot more uncomplicated that some "all in one" machines. And I really don't get hidden pumps or bonded elephants.