How long is a piece of string? (or, cooling the wort)

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tonight_we_fly

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I have a question which would really help a lot with my preparations for brewing very shortly if anybody can answer.

After several kits (and a bit of minor experimentation along the way), this weekend I will be attempting my first extract brew. I’ve got all of the component parts and ingredients, the only last thing remaining is having the time to do it.

However, the one area in which I’m really unsure of what to expect is how long the wort is likely to take to cool. I don’t have a wort chiller, I’ll be putting it in the sink surrounded by cold water and ice cubes.

As a generalisation, let’s say I’m going to have about 2.5 gallons left at the end of the boil, to be mixed in the fermenter with 2.5 gallons of chilled bottled water which will come out of the fridge. A bit of maths suggests to me that I’ll be needing to get the boiled wort down to about 40-45°C before adding the chilled water and then being at the right temperature to pitch the yeast.

However, this being my first extract brew, I have absolutely no idea how long this wort is likely to take to cool. Searching around the internet for solutions, suggestions seem to range from twenty minutes to about sixteen hours.

The reason I’m asking is because the Wyeast pack that I’m using instructs me to break the inner pack and shake it up approximately three hours before use; the last thing I want to do is to prepare the yeast, but then find out that the wort does not cool enough to pitch it until the following day or something.

I’m aware that there are lots of arbitrary elements involved in how long the cooling is likely to take; but I’m not looking for a precise answer, just an overview really. Obviously no two circumstances are the same (how long is a piece of string?), but I’m just wondering what other people’s experiences have been in the past of how long it’s taken for them when cooling wort in the sink?

Thanks in advance for any responses which people are able to provide.
 
When I did my extract brew, I was cooling about 5L in the sink and it took about 35 mins from memory to get down to 40C (I did the same as you and added chilled water), and my recent AG brew which was about 13L took around an hour to get down to pitching.

I changed water every 5 mins for the first three changes, and then 10 mins after that.

If you are chilling it in a metal pan I would be amazed if you need more than an hour or so for that volume. If it's in a plastic FV, it may take a little longer due to the insulating properties of the plastic.

But either way, nice one on going for your first extract brew - the results will be great!
 
Thanks a lot for that fbsf. This is really helpful, as it sounds then like it's something that I can reasonably expect to do on Friday evening if I start as soon as I get home from work, rather than ending up finding myself staying up until about 5am or something waiting for it to cool down.

Thank you!
 
nice 1 for going the next step :thumb: , your wyeast pack will most likely need at least 3 hours , don't pitch until pack has expanded or you'll have a slow start ,waiting for the wyeast pack could take a lot longer than 3 hours ( i have had issues with wyeast but never white labs yeast )And it won't hurt leaving the yeast (even if expanded) until you are ready (brew temp) , good luck and have fun .
 
Ah, thanks for that pittsy.

I took the yeast pack out of the fridge this morning; the plan is to, er, smack my yeast up (or whatever it is you have to do to get the packet going) right at the beginning whilst I'm heating up the initial water for steeping.

I'll most likely start the yeast pack going when I get home (at about 6:30pm), and then was planning to watch the football on ITV later whilst the wort's cooling down and so probably will look at pitching when it finishes at around 10pm (assuming it's cool enough at that stage). I'll make sure the pack has suitably expanded though.

Thanks for the advice!
 

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