Blow Off Tube (Stainless) - 1/2 in. OD

Blow Off Tube (Stainless) - 1/2 in. OD

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Tired of clogged airlocks from your intense and vigorous fermentations? Simply place one end in your stopper instead of your airlock and the other end into a bucket of water or sanitizer and worry no more. Made from stainless steel, making it durable and easy to clean.


  • Stainless steel
  • 1/2" outer diameter
  • 7/16" inner diameter (approximately)
  • 19" Tall x 7.5" Wide
Item # FE521
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 1 LBS
Community Q&A

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Browse 2 questions Browse 2 questions and 2 answers
Why did you choose this?
MoreFlavor Store
Daniel W on Dec 20, 2022
initial fermentation
GLEN D B on May 24, 2021
Daniel W on Dec 20, 2022
Looks better than the homemade one I currently use
MICHAEL C on Jul 21, 2022
initial fermentation
GLEN D B on May 24, 2021
Already have one, like it and wanted another.
Charley B on May 19, 2021
I have 2 and need one more.
Victoria A on Aug 22, 2020
To see how this works versus 3 piece airlock.
John H on Jul 8, 2020
Actually I am going to use it with some 1/2" flange couplings to make a drop light above my built-in BBQ.
BN2Wild on Dec 3, 2019
Attempt to prevent blow off from fermenter
Andrew W on Sep 11, 2018
blow off
John C on Sep 10, 2018
Trying something new to save space in temperature controlled fermenter fridge.
Valued C on Jun 2, 2018
don't like the flexible hoses
gerald jones on Apr 6, 2018
this will be perfect for fermenting in the lager fridge
Adam Reynolds on Mar 16, 2018
Looks better than the homemade one I currently use
MICHAEL C on Jul 21, 2022
Already have one, like it and wanted another.
Charley B on May 19, 2021
Will this work on the anvil crucible?
Kevin Hinze on Feb 25, 2022
BEST ANSWER: Yes. This will work beautifully. I used a little sani for lube and pushed it into the bung where the airlock would go. On the other end I attached a little silicone tubing and put the end in a cup of sani.
Will this work with the stopper in the premium brew kit?
Paul Adair on Jan 18, 2019
BEST ANSWER: I used a standard #7 bung and it works fine .

4.5 / 5.0
4 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
Good addition.
Perfect fit and works great. Easy to clean. Will last a lifetime.
August 18, 2022
1 year ago
Rated 4 out of 5
Good blow-off tube; but the diameter advertised is incorrect.
I was initially sent a blow-off tube with lots of stuff stuck to it: glue and blue paper. The dimensions were wrong too. It was advertised as being 1/2" inner diameter, when in fact it is 1/2" outer diameter. The inner diameter is smaller. (The height and width are correct as advertised.)

I contacted MoreBeer about this, and to their credit they replaced the sticky tube with a new, clean one. But the new one has the same dimensions.

I thought about how this could be. I imagine it might be a rounding error from metric dimensions. I wish MoreBeer would correct how it is advertised.

Functionally, it's good. The stainless steel used is strong. It can be puahed into a 6.5 stopper, and the stopper+tube fit nicely in a regular glass carboy.

If you want a steel blow-off tube, I'd recommend it over the narrower one. Just understand and expect that the inner diameter is less than 1/2".
September 14, 2019
over 4 years ago
Response from MoreFlavor
Hi Lawrence - Thank you for your review. You are correct, the blowoff cane was incorrectly advertised as 1/2" inner diameter instead of 1/2" outer diameter. We have updated our descriptions accordingly. Cheers!
October 1, 2019
Patrick T
Rated 5 out of 5
Exceeded expectations
I have always questioned the sanitation of blow off tubes..with this I simply placed my carboy bung in hot water until the center hole was very flexible, slit the blowoff cane onto it, and set a water pitcher with solution next to carboy. Worked perfectly.
March 21, 2018
over 6 years ago
Rated 4 out of 5
Wish it was an inch longer and an inch wider
Hated using my 1/2 in Silicone Hosing as it didn't keep shape very well. I primarily use FE331 (6.5gal Italian glass threaded neck carboy) for fermentation and the cane works, but it is just a little too short and skinny for convenience. It works perfectly as intended, but where the cane ends is right next to the carboy right near the top of a quart canning jar.
September 19, 2017