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.
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.
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!
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.
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.
On my better bottles this works very well as a blowoff tube...Once fermentation slows down though I do not think it will keep a seal to use a airlock...but I mainly bought it for a blowoff so it works for my needs
I use this in conjunction with an airlock or blow off tube and SS thermowell to monitor temps during fermentation when doing smaller batches in carboys. I've got like four of them now and they all work great. I was worried about fit varying from one to the other, but they're all spot on and seal to mouth of the carboy tightly They're easy to clean and sanitize and get the job done without muss and fuss.
These cover the entire top of the carboy, keeping the glass clean, and eliminating the crevasse between the glass and a bung. I had to cut the enter nipple down a little so it was big enough for the airlock to fit in, but that was easy.
I much prefer these to stoppers. Racking is easier, blowoff is easier, second aperture for thermowell should you so desire, plus a stylish safety orange color. What's not to like? (Little caps can get lost - keep them in a ziploc in a designated place when not in use to avoid this.)
Using glass carboys with sanitizer on them, sometimes the bungs don't stick. These pop on like a lid and stay put. I also like to use the racking cane with air filter and not use the auto siphon. it gives me a little more control of what I pick up when racking.
Best cap for yeast starters on flasks and good carboys
I use this cap for when I know my primary will be very vigorous and i'm using a carboy. When I am beginning a batch the cap fits perfectly on my flask for the yeast starter. I use an airlock on middle port and leave the other capped. Must have!!
I don;t use any of the other stoppers and such. Occasionally you get defective one where the plastic isn't right and it may have a hole in it, or improperly formed ports, but B3 will replace if that happens. It's easy to lose the little caps on the ports so keep track of those, otherwise they are very handy and allow for all kinds of uses. Attaching a blowoff tube, airlock, thermometer, racking cane, etc.
This works great as a hood for racking beer; however, the diamater of the blow off hose has never been adequate for the majority of the beers I brew. At least anything above about 1.060 starting gravity. I prefer to use a home setup for that (one inch plastic tubing with two 90 degree elbows)! I've had to clean the walls and floors too many times with small blow-off tubes and air locks!
Love these. They are a little loose but i think that is the whole reason for them. If you want it snug, easily get some zip ties and cinch it down. By far easier to use than a bung. Plus you can use it with a blow off tube or an airlock. It also makes it easy to siphon off liquids to a secondary or a keg.
I liked this b/c I've used it to put on top of Sankes when fermenting there (you just need to sit it in boiling water for a minute to make it more pliable at first), or with a number of carboys. No complaints!
I've never had problems getting this to seal easily against a carboy, but I do have a lot of different-sized airlocks. Often, I have to cut off the tip of the bigger (central) nipple, in order to get the airlock stem to fit properly. No big deal: they're cheap and I have like a dozen of these guys.
I prefer this to a rubber stopper, but it has three major problems: 1) The rough interior really holds onto trub and other junk 2) it does not make a good seal on a 6gal better bottle (I use a worm clap to fix this) 3) the caps like to run away from me! (Yea I know that's mostly my fault)
That said I have 4 of these now and really do prefer them to a plan stopper
I was really excited about this product, but extremely let down.
The inside of the piece is so poorly molded there are large cavities and countless imperfections in the material. This prevents a good seal from being made on the top of the carboy, defeating the entire purpose of the product.
If you attempt to use the product as depicted in item R550 "Sterile Siphon Starter" this item poses two extreme challenges. 1) There is no hope of cramming a 3/8" stainless tube through the hood (at room temperature it is not very pliable, I had to cut mine to fit a 3/8" racking cane). 2) The imperfect interior allows gas to escape through the hood's seal instead of forcing liquid out the racking cane.
I'm not sure if I got a lemon, or if the item in R550 is not actually this, but I wouldn't even trust it as a blow-off. I can already imagine gunk dripping down the sides of the carboy bypassing the hood's seal. Although it was cheap, I still wish I could have saved the money.