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Carboy Blow Off Hood (Smooth Neck Carboys)
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So much easier than a bung!
Rubber Carboy Blow Off Hood with two attachments for vinyl blow off hoses (3/8" or 1/2"). Fits our 3, 5, 6, or 6.5 gallon glass carboys with smooth necks. Can also be used on 5 and 6 gallon plastic carboys.
TIP: Carboy hoods are exceptionally useful for blowoff tubes. Just add 3' of 1/2" racking tubing into a bucket of water as your airlock.
Item # FE500
Shipping Eligible for Free Shipping Program
Availability California - In Stock
Pennsylvania - In Stock
Weight 0.06LBS
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Better siphoning
Joshua B on Feb 13, 2018
Better siphoning
Joshua B on Feb 13, 2018
To use for closed. pressurized transfer with a racking cane
Anthony S on Feb 7, 2018
To use for closed. pressurized transfer with a racking cane
Anthony S on Feb 7, 2018
Is there an erlenmeyer flask that this fits on nicely?
Kent Erickson on Feb 19, 2018

4.1 / 5.0
38 Reviews
5 Stars
4 Stars
3 Stars
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1 Stars
Nice product but a airlock with tubing as a blow off seems to be more secure.
Seemed to work ok but found air does leak around the seal. I wrapped package tape around the bottom of the cap and affixed it to the bottle.
January 20, 2018
1 month ago
Works great with thermowell and blow off tube
Used with thermowell and blow off tube. Excellent
June 22, 2015
Excellent for Blow Off Tubes
I have been looking for a better blow off solution for my Better Bottle fermenters and this does the job. Fits perfectly and doesn't come off like the stoppers do when they are wet with sanitizer and being pulled with a blow off hose.
May 29, 2015
Love these for blow offs
These are great to have a small blow off on, then easily switch to airlock when fermentation dies down. It is nice not having to swap out to a bung when changing over to the airlock.

Would love to see something along this design with bigger tubing to be used for the blow off though.
May 27, 2015
Good product
With a zip tie I haven't had any of these pop off during fermentation and while moving carboys
May 5, 2015
easy of use!
i love how easy these are to use and have two ports on them. easy to switch between airlock, blow off tube, or thermowell without having to remove a whole rubber stopper. as mentioned in other reviews, they seem to fit loose, but when you press on one side of a plastic carboy, you can still see the pressure in the airlock change too, so it's still doing it's job and seals just fine. a must need accessory to their plastic PET carboys!
May 5, 2015
fit carboy, works great
Fit my carboy. White plastic covers fit snug. Would buy again
May 5, 2015
great with thermowell and blow off tube
Really great to use with a thermowell for keeping track of fermentation temperature and a blow off tube
April 30, 2015
Good idea, QA problems
I have four of these, three of which I got in a single order. Two of my four are molded such that 1/2" tubing does not fit snugly. One of them I have to tape them up with electrical tape and hope for the best when using it for a blow off tube, one I just don't use at all because the tubing just won't stay on there. The other two are prefect. The design is good, but the quality assurance is not.
October 17, 2014
Fits 5 gallon water jugs perfectly
I use this to connect the blow-off tube to those standard plastic blue 5 gallon jugs. It fits perfectly. I use the larger hole for the blow-off, then I thread my digital thermometer cable through the smaller hole. Easy to clean and sanitize as well.
May 23, 2014