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Old 08-12-2013, 05:03 PM   #1
Ster
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Default Boil over

So I have been boiling 1/2 of my extracts for 60 min, and the other half added for last 5 min.

When the boil first starts, I lift the pot off of the burner, the foam subsides and I get a rolling boil. When I add the late additions, the boil stops. When it restarts, I have to remove the pot from the burner 5 or 6 times to avoid a boil over.

Why is that?



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Old 08-12-2013, 05:05 PM   #2
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Protein break; basically the proteins in the wort reacting to the boil. Since you're adding more proteins with the late extract add, they're "breaking" again when the boil resumes.



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can i drink this? I mean. Im gunna. But is it fine?
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it's not a barley wine. it's an ale.
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Old 08-12-2013, 05:34 PM   #3
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NordeastBrewer is correct, although I'm just going to give you some advice. Buy some Fermcap. It will eliminate boilovers entirely and one bottle lasts forever. I think people who don't use Fermcap usually just use a spray bottle filled with water to spray the foam to keep it under control, although I have no first hand experience with using the bottle method. Either way it is probably easier than removing it from the heat.

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Old 08-12-2013, 05:36 PM   #4
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Word. Fermcap-S is my hero each and every brew day.

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Originally Posted by yeoitsmatt View Post
can i drink this? I mean. Im gunna. But is it fine?
Quote:
Originally Posted by yeoitsmatt View Post
it's not a barley wine. it's an ale.
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Originally Posted by bottlebomber View Post
Have you seen the price of ketchup lately? And I'm not talking Heinz.
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Old 08-12-2013, 05:36 PM   #5
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Is your burner propane or electric?

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Old 08-13-2013, 04:27 PM   #6
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Electric.

I don't mind.. I've never left the burner when this happens.. so no mess.

I just don't understand why the first hot break settles immediately after removing the pot from heat, while the 2nd one take 5 or 6 times.

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Old 08-13-2013, 04:36 PM   #7
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Electric.

I don't mind.. I've never left the burner when this happens.. so no mess.

I just don't understand why the first hot break settles immediately after removing the pot from heat, while the 2nd one take 5 or 6 times.
Are you adding hops around the first break? Hops can help break the surface tension and precipitate the break proteins. I haven't brewed an extract batch in a year or so, but I do remember there being another break when the kettle came back to boil after an extract add. Try and time a hop addition with your late add; like 15 mins extract, bring back to a boil and add 15 min hops. Should help with that break some. Another option is to do the late extract add at flameout; kill fire, add LME/DME and stir to mix in well, cover and let steep for a few mins to ensure the extract's pasteurized and chill. The latter is my preferred method for late LME adds, it eliminates the need to kill the boil in the boil.
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Originally Posted by yeoitsmatt View Post
can i drink this? I mean. Im gunna. But is it fine?
Quote:
Originally Posted by yeoitsmatt View Post
it's not a barley wine. it's an ale.
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Originally Posted by bottlebomber View Post
Have you seen the price of ketchup lately? And I'm not talking Heinz.
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Old 08-13-2013, 04:44 PM   #8
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I thought the hot break was desireable to precipitate unwanted proteins. I would think an addition @ flameout would not have this benefit.

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Old 08-13-2013, 04:46 PM   #9
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Quote:
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I thought the hot break was desireable to precipitate unwanted proteins. I would think an addition @ flameout would not have this benefit.
You are correct, it is. But.... when they make LME/DME, they boil the wort to concentrate it (and then spray dry it for DME) so the break has already happened. It breaks again when boiled, but nothing like a grain wort, and it's not necessary since the break happened once already during manufacture.
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can i drink this? I mean. Im gunna. But is it fine?
Quote:
Originally Posted by yeoitsmatt View Post
it's not a barley wine. it's an ale.
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Originally Posted by bottlebomber View Post
Have you seen the price of ketchup lately? And I'm not talking Heinz.
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Old 08-13-2013, 04:46 PM   #10
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i can tell you from first hand experience that the easiest and cheapest way is to use a spray bottle with water. I just did a 5 gallon extract and had about 4 gallons in a 5 gal pot, many times it wanted to boil over but the spray bottle kept everything in the pot



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