17% Off A Single Item
Use Code: PRIME     Shop Now

Text Us 952-260-4404

Standard Carboy Cap

More Views

Standard Carboy Cap

SKU: 7044

Fits standard 3, 5, 6, or 6.5 gallon glass carboys. Put a racking tube through the center spout, fit the cap over the mouth of the full carboy, then blow hard into the second hole to prime a siphon.

Free Shipping on Orders Over $45



To use the Carboy Cap: Push a racking cane through the center tube, place on the top of your carboy, blow into the other tube, and a siphon is easily started. May also be used for blow-off when fermenting. Attach a length of 3/8" ID tubing to the hood, and run the tubing into a bucket of water. When used this way, the carboy cap takes the place of an airlock.

Note: This item is only compatible with glass carboys in 3, 5, 6 or non-acid 6.5 gallon sizes.
Details & Instructions

Additional Information

4.7 / 5.0
40 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
It did the job well
April 8, 2019
4 months ago
Used to remove airlock and use tin foil for cold crash now I just sanitize and pop this on top. Havent got the chance to ferment with it yet but appears you could just stick a hose right in and run to a container of water and never remove your top for cold crash again.
April 3, 2019
3 months ago
Better options are available
They do work but better of just buying the silicone waterless airlocks, they are magical.
March 2, 2019
1 year ago
Very handy!
November 15, 2018
9 months ago
Great for use as a blow off tube
Works as it should. Fits well on a standard glass carbon, even under an over zealous fermentation as a blow off tube.
Works like it is intended, fits well even under pressure!
Works like it is intended, fits well even under pressure!
September 14, 2018
11 months ago
Good Stuff
I picked up one of these to convert a 5 gallon water bottle I had on hand. Saved me the cost of purchasing a carboy, the Racking cane fits perfect as did the vapor lock. I will buy this product again to outfit the other two 5 gallon bottles I have in storage.
February 3, 2017
over 2 years ago
Rethinking this one
It leaked. Had a pin hole in top which I fixed with a hot poker. Also had to put several rubber bands around circumference to seal completely.
February 3, 2017
over 2 years ago
Makes siphoning a lot easier
Using a racking cane, I use a quick blast of CO2 to get the siphon going rather than blowing into the tube.
January 29, 2014
I know this isn't supposed to be used with the better bottle,but I got one & it fits snugly. I put the airlock in the center tube for one week oaking,etc. Working just fine so far on my 6G BB.
November 26, 2013
Helps out a lot when transfering
Makes racking fast an easy, just insert your cane and blow in the other hole and the siphoning starts.
November 17, 2013
Customer Q&A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 3 questions Browse 3 questions and 9 answers
Will this fit on a 5 gallon plaster water jug? Like the ones you use in a water dispenser?
A shopper on Aug 24, 2018
BEST ANSWER: I really have no idea, I use mine on glass bottles and not plaster bottles, or plastic.
Can you attach an airlock to this instead of a blow off tube?
WSW on Jun 26, 2018
BEST ANSWER: Yes, I do. Much easier to take on and off than the other types and it stays upright when you set it down with the airlock while testing.
Will this fit a 6 gallon Bubbler plastic carboy?
A shopper on Jan 12, 2017
BEST ANSWER: I think the bubbler OD on the opening is just about the same size as the glass carboy so it should fit. I also use a clamp on mine to keep it tight for making sour beers and adding a CO2 blanket to the carboy.

You may also be interested in the following product(s)

Call Us 888-449-2739

Text Us 952-260-4404

Please wait...

Your selected product has been added to your Cart.

Continue Shopping Go To Cart