Carboy caps - airtight?

akula169 · Sep 30, 2005

Can a carboy cap, like this:

http://www.midwestsupplies.com/products/ProdByID.aspx?ProdID=4675

be trusted to be airtight for fermentation?

With airlock and other orifice capped with provided cap, of course.

I've had a couple stoppers pop on me, and this seems like a much better solution.

homebrewer_99 · Sep 30, 2005

They're airtight enough.

I have one myself that I use for prolonged lagering (2-3 months).

akula169 · Sep 30, 2005

it seems kinda loose... thinking maybe getting some kind of elastic to tighten the seal on the groove...

OtherWhiteMeat · Sep 30, 2005

Air is going to find the easyest way out, even if the orange cap is a little loose, its still going to be easyer to go out the airlock. But im always more safe than sorry. You could run tape along the seam too.

cap46 · Oct 1, 2005

I have one that I purchased from my local hbs. The one I purchased was for a 6 gallon carboy. They also had a differant size for the 5 gallon carboy. If I remember the one that I took off the shelf was the bigger cap was really for the 5 gallon carboy. Mine seems to fit tight.

akula169 · Oct 1, 2005

The few that I picked up are supposedly for 5 and 6 gallon carboys. It seems slightly loose even on the 6 gal.

There is a bigger one for the 6.5 gallon, I guess.

I'm gonna find something to secure it down a little better.

You'll see why I'd like to move away from stoppers in another post

cap46 · Oct 1, 2005

The reason I went to these is just incase I under estimated and should of had a blow off hose I can just slip 1 on with out a lot of problems. Before I purchased one my wife calls me one day at work and wants to know what she should do I had crap every where. I think even she could put on blow off hose if needed. But then I probably should any way.

Carboy caps - airtight?

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