Carboy Cap- 3, 5 & 6 Gallon Carboys

This does NOT replace a regular carboy stopper though. It is helpful for me in other things such as vacuum degassing and transferring to secondary carboys or bottling buckets. Someone else pointed out how it can be used to start a siphon without a special siphon device hand pump too. The seal is not that snug so you might need some vaseline to help with that.

Fit perfectly as described great price

Fits great on my 5 gallon glass carboy and should do the job. I wish I knew what it was made of because I don't think it's silicone, has more of a PVC feel to it. The caps are fairly loose, especially the large one so if you plan to use this with an airlock keep that in mind.

Looked around and finally found these. Work perfectly on my glass 6 gallon carboys

I've struggles with auto-siphons and primer devices for a long time before discovering this little beauty. Just thread your racking cane through the center and give a stiff puff into the side inlet and presto! Your wort will be transferred quicker than you can say "I need 4 more feet of tubing." The only aside is that it will not fit on 6.5 gal carboys. You'll have to purchase a separate model to fit. When using for storage, again, just snap on with the 2 white caps in place.

This is not optimal for a plastic carboy.

As a preface, I'd like to say that I'm really bad at brewing beer, so this cap has no culpability in my first disaster. The first time I used this, I had added way too much sugar (put the priming sugar with the sugar already in the recipe during the first phase). Later on, I heard a thud in the cellar and came down to find this bad boy had been blown across the room by a suds explosion. It had smacked a beam but seemed to be okay and I've been using it to brew ever since.

If you use the Carboy cap on the clean carboy with a racking cane and a racking cane on the full carboy with tubing between, you can the start the siphon by putting suction on the second port on the carboy cap - this really reduces air exposure of the wine. Much easier to clean and use than my auto-siphon!

Decent

Works perfectly with my 5 gal carboys.

Pinholes make these useless

Be aware!!!! THIS IS NOT THE REAL DEAL!!! Doesn't fit 6 gallon carboy. These caps are more stiff like plastic rather than rubber so they are not as flexible as my other ones bought at my local homebrew store.

fie great works good. this.