
all grain
You need to collect enough for your pre-boil volume. For example; if you're brewing five gallons you may want to collect 6 gallons as the pre-boil volume. Also take into consideration, you will loose some wort to the hops/hot break material. Try to enjoy brewing, and dont get worried if you end up with a bit more/less than you planned. It usualy takes a few brews to fine tune everything. 

Ideally you will, as shiny beast says sparge to collect sufficient to allow for evaporation during the boil. What you also need to check though is the specific gravity of the runnings.
If your runnings get down to 1.006 (corrected for temperature) stop sparging immediately. Adding runnings lower than SG 1.006 can have an adverse effect on flavour and head retention
But above all enjoy your brewing, there seems to be a lot to remember during your first few brews but it gets easier quickly
If your runnings get down to 1.006 (corrected for temperature) stop sparging immediately. Adding runnings lower than SG 1.006 can have an adverse effect on flavour and head retention

But above all enjoy your brewing, there seems to be a lot to remember during your first few brews but it gets easier quickly

Depending on the conditions you can loose anything from 10% - 30% of the boil volume due to evaporation. You can top this up with water at the end but it's better if you've got some extra wort. If you can collect your desired volume and get it boiling - then continue to collect the extra runnings seperately this usually works out pretty well.
Frothy
Frothy
Frothy, just refering back to Tubby's advice, would you use runnings below 1006 to top-up evaporationFrothy wrote:If you can collect your desired volume and get it boiling - then continue to collect the extra runnings
seperately this usually works out pretty well.
or would you calculate a larger grain bill than the recipe states (according to your efficiency) to get your surplus?
Stop extraction and don't use the runnings once you hit G1006 as Andy says. Malt is cheap, so at least until until you get your technique and equipment toned in the better way is to have more grain than you need. At least you'll hit your targets even if your efficiency is low, and it's better to have too much wort and throw some away (or freeze it to make yeast starters) than suffer the disappointment of a weaker than intended, or a smaller than intended, brew.notassuch wrote:Frothy, just refering back to Tubby's advice, would you use runnings below 1006 to top-up evaporationFrothy wrote:If you can collect your desired volume and get it boiling - then continue to collect the extra runnings
seperately this usually works out pretty well.
or would you calculate a larger grain bill than the recipe states (according to your efficiency) to get your surplus?
Also, there's a school of though which I'm tending to agree with that you get better quality by using more a bit more grain than needed and stopping the sparge short, thereby not having to use the weakest runnings at all.
Last edited by SteveD on Sun Mar 18, 2007 3:21 pm, edited 1 time in total.
Thanks Andy,
My first brew yesterday (Eskimo stout) fell well short of the
19L in Bob's recipe. Topped it up with water as I'd already
sparged down to 1006 and ended up with an OG of 1049, as
opposed to the target 1051.
Not going to lose sleep over it but your tips are invaluable.
/edit: And thanks SteveD. I'll definitely take this into account
on Brewday 2.
My first brew yesterday (Eskimo stout) fell well short of the
19L in Bob's recipe. Topped it up with water as I'd already
sparged down to 1006 and ended up with an OG of 1049, as
opposed to the target 1051.
Not going to lose sleep over it but your tips are invaluable.
/edit: And thanks SteveD. I'll definitely take this into account
on Brewday 2.
Only 2 points adrift? You're right not to lose sleep over itnotassuch wrote:Thanks Andy,
My first brew yesterday (Eskimo stout) fell well short of the
19L in Bob's recipe. Topped it up with water as I'd already
sparged down to 1006 and ended up with an OG of 1049, as
opposed to the target 1051.
Not going to lose sleep over it but your tips are invaluable.
/edit: And thanks SteveD. I'll definitely take this into account
on Brewday 2.

agreed SteveD thats the way I am going keeping the grain proportions the same - seems to have less of a gritty taste if that makes senseAlso, there's a school of though which I'm tending to agree with that you get better quality by using more a bit more grain than needed and stopping the sparge short, thereby not having to use the weakest runnings at all.