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Home Brew Forums > Home Brewing Beer > Bottling/Kegging > SS growler top blew off
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Old 03-16-2014, 05:52 AM   #1
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Default SS growler top blew off

I took a break to grab a growler from my local brewery (Singlecut) and when in hopped back on my bike after riding for about 5 minutes I heard a large POP. I tore open my backpack and found the growler open and beer everywhere. Was it the bike riding? Would this have happened with a glass growler? I've taken a picture of the offender and the backpack. imageuploadedbyhome-brew1394945467.284804.jpg imageuploadedbyhome-brew1394945525.060660.jpg


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Old 03-17-2014, 05:12 AM   #2
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Do you think it worked its way unscrewed while you were riding, or do you think it built up so much pressure it blew the top off past the threads?


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Old 03-17-2014, 05:14 AM   #3
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Considering he heard a loud pop I'd think it a safe bet the cap popped over the threads.


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Old 03-17-2014, 05:19 AM   #4
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I have had screw tops under pressure that "pop" when I have about a quarter turn left. I am assuming as the threads taper towards the end the pressure overcomes the friction of the threads. I own a growler just like that an I think it would be highly unlikely for the top to go from snuggly screwed on to popping completely off... But I guess there is no way to tell without a controlled experiment.


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Old 03-17-2014, 06:09 AM   #5
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Loud pops will also happen with soda cans in a pack on the back of a dirt bike.

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Old 03-17-2014, 06:14 AM   #6
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I know with that growler you really have to screw the lid on extra extra tight. I also did a comparison from that ss growler and a glass growler and it holds about 6oz less than glass. It sure keeps things super cold super long.


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Old 03-17-2014, 06:59 AM   #7
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I find beer doesn't get shaken up much at all when I put it in panniers. Using a messenger bag it did get jostled a lot.

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Old 03-17-2014, 02:53 PM   #8
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I thought I had the lid on really tight but next time I'll have to really give it a twist. All I can think is maybe there was a bit too much headroom and the beer had room to shake around. I'll also probably be a bit more careful next time and maybe use my panniers.

I've used this growler In a backpack a lot, just never while riding my bike. Could the beer being highly carbonated also play a roll?

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Old 03-17-2014, 06:20 PM   #9
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I carry a pretty similar one in my panniers all the time, and don't have any problems with the top, as long as it's not cross-threaded or anything. I guess my beers aren't very highly carbonated, though (I tend to like them kinda English-y, under 2.0 volumes).


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