Note:The Acid Carboy Cap for use on older style 6.5 gallon acid carboys with the threaded tops.
This Cap is too small for our current 6.5 Gallon Carboy (U7007) with a standard neck. See our Standard Carboy Cap for that carboy.
Customer ReviewsWrite a review
they fit good an easy on off
Useless. Does not fit either of my 6.5 gallon carboys.
I was using a rubber stopper that always wanted to pop out. Most times I needed to do a heavy tape job around the stopper to keep it in. Big hassle anytime I wanted to check gravity. This cap fits perfectly snug...seems to be airtight as my blowoff tube bubbles like it always did. I don't recall the size, but I had some tubing laying around that fits around the smaller cap stem for very easy blowoff tube setup. Best $4 I ever spent.
I wanted to use this for blow off tubing. It isn't an ideal fit, but it works. Like one reviewer said, it is rough on the inside. I hope this doesn't help harbor bacteria or yeast. Sanitize well. It is pretty cheap.
I have 2 of these for both of my 6.5 gal. carboys. Fits snuggly and is actually a little difficult to get off. I run a 1/2" SS thermowell down the middle and a length of 3/8" silicone tubing off the side as a blow off/airlock. Works perfectly.