Blowoff Hose Back pressure?

[mmlipps]

I use a 6.5 gal glass carboy. 90% of my batches end up requiring a blow off tube sometimes I catch it before it hits the airlock and sometimes I don't. So I've decided to just always use a blow off tube. Now 2 batches in a row the fermentation has been a little slower and no where near hitting the blowoff tube. So I am wondering if the depth of the blowoff tube in the bucket of water affects the rate of fermentation since their would be greater pressure to overcome to bubble out and therefore the pressure inside the carboy is going to be equally higher. Thoughts?


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[Calder]

Should not be a problem. I don't know how much luquid you have in blow-off jar, but 2 inches of water is less than 0.1 psi. Probably similar to the difference in presure of changing altitude by 100 feet.

You really should keep the liquid to a minimum. To just above the tube. If temperature turns cold, you can suck that liquid back into the fermenter. Maintaining a low liquid level should allow the siphon to break before the liquid gets all the way back.

 

[mmlipps]

Probably about 5-6 inches deep


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[Calder]

Probably about 5-6 inches deep


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Probably not a problem for your beer, but you really should use a lot less liquid to prevent any suck-back causing a problem.

 

[k1ngl1ves]

What temp are you fermenting? The higher the temp, the greater the chance of needing a blow off tube.

Try fermenting at the lower end of the yeast's requirement. It could eliminate your issues in the future.

 

[mmlipps]

What temp are you fermenting? The higher the temp, the greater the chance of needing a blow off tube.

Try fermenting at the lower end of the yeast's requirement. It could eliminate your issues in the future.

I maintain 68-72



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[k1ngl1ves]

I maintain 68-72



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Try lower, if you have the available equipment. Depending on the yeast, most ales I brew are fermented around 60-64° and the krausen never gets out of hand. Once initial fermentation is over, you can let it come up a bit in temp.

The only time I need to set up a tube is if I'm brewing a big beer, and that's just for insurance.

Give it a try. Hopefully it'll solve your problem.