Low pre-boil gravity mini-BIAB

Hey all,

So tonight I took the plunge and put my first every all grain BIAB on.
It's a mini BIAB on the stove in my appartment.

Grain Bill...
2100g Pale Ale
420g Munich 1
210g CaraAmber

Starting volume was 18L hoping to end up with a 10L wort.
After pulling the bag, I think there is probably about 14L left in the pot.

Kept the mash at around 65% for 90mins.
After cooling the initial sample to 20c, my gravity reading is 1.034 .
Was aiming to get up around 1.040 as this is an APA.

I've got it boiling now, thinking of trying to get some more out of the spent grains.
Or should I just add some DME? Not sure what to do....urgent help would be much appreciated!!

Cheers!!!
Jake.

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Thanks heaps, Joshua and Pistol.
Just cubed it and finished cleaning up....mental note, next BIAB during daytime .
I think I ended up with around 13L post boil, not sure about the gravity yet.
Melted my hydrometer tube trying to take a reading !!

The whirlpool and syphen into the cube worked really well.
Have put aside a sample to cool overnight and will test it tomorrow when I get a new hydrometer tube.
Wish I had a really narrow vase or something lying around!!

All in all, had a really good time...and jeez this place smells like a brewery!
Will put up some more details and measurements later to try to get some help for next time.

Cheers!!
Jake.

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So after a good night's sleep, headed to the LHBS to get a new hydrometer jar.
Turns out my SG is 1.048...not too far off the 1.052 I was aiming for

So started with 18L.
Heated to 69c.
Mash in dropped it to 65c.
Agitated it every 20mins or so and checked the temp.
Stayed pretty constant at 65c for the whole 90mins.
Pulled the bag by hand, squeezed it and let it drip for about 15min.

Start of boil 16L (1.034)
End of boil 14L (1.048)

Any feedback would be much appreciated so I can improve my next one.
Thanks again by brewing friends .
Jake.

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Hi Joshua & Stux,
According to "The Calculator", should have had the following...

Brew Length 10.00
Fermenter Trub* 0.80
Volume into Fermenter 10.80
Kettle Trub & Buffer* 1.80
End of Boil Efficiency* 79.00
End of Boil Gravity (OG) 1.052
End of Boil Volume 12.60
Boil Length 90
Diameter of Kettle 32.00
Evaporation Per Hour* 2.50
Evaporation for this Brew 3.75
Expected Start of Boil Gravity 1.040
Start of Boil Volume 16.35
Grain Bill Required 2702
Grain Absorption* 1.70
Water Required is... 18.05
Approximate Mash Volume 19.8

Because I am using an electric stove, the boil was pretty slow (had to have the lid half on).
I'm guessing if I had a proper burner, could have made it down to the 12.6L at end of boil.

Thanks for your valuable help

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Could I just boil it for longer??
Or would that cause some other complications?

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Thanks PP, Hashie n Stux.
The brew is now happily bubbling away at 18c...can't wait to taste it!!
I'm constantly impressed by the amount of usefull brewing information provided on this forum .
Cheers!

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