Adding estimated boil off liqour during the boil

[Ceejay]

Just checking, as I'm pretty sure I'm right with what I'm saying...

I'm boiling 28 litres of wort at 1052, which is actually my target OG. I know i'm going to lose 12.5% per hour over a 90 minute boil (based on previous brews), so am I OK to add 5 litres of pre-heated water during the boil, as long as it's before 80 minutes?

I figure it's easier and less time consuming to do that rather than back liquor at the end.

 

[Kyral210]

Download Beer Smith (http://www.beersmith.com/) and it will work everything out for you.

 

[Ceejay]

Aye, I already use that - I actually used that to do this recipe; it's a really nice piece of software. What I was trying to say was - I know I'm going to have to liquor back by 5 litres, am I OK to add this during the boil, rather than after the boil? Doesn't really matter now, as I've already done it!

 

[Good Ed]

I think you're ok with what you do CJ. To get 23L, I usually start with 27L in the boiler and add 5-6L during the boil. I boil this in a pan in 2L batches before adding to the copper, so that you don't cool the wort when adding it. It work's fine for me, good luck :

 

[craigite]

I hope it's ok as I've being doing something like that for years.
Bit confused about the 80min reference, please expand?

I tend to top up my boiler just before it starts to boil but I'm not shy in topping up with a litre or two of pre boiled water if my evaporation is a bit more than planned.

Wouldn't have thought such a small difference in volume would affect the brew, the hop utilisation etc.

Anyway, great question and I'm looking forward to the replies :thumb:

 

[Ceejay]

Ah, the 80 minute thing was just a sort of belt and braces approach to sanitisation, just to make sure that any liqour/wort that ends up in the FV should be boiled for at least 10 minutes since that seems to be the rule of In reality, it probably doesn't matter! :hmm:

Cheers for the replies chaps :thumb: