Ball, Kerr, Mason canning jar CO2 Harvester Kit

CO2 Harvester Kit

Average rating:
average rating 91%
Wide-mouth Ball, Kerr, or Mason canning jar CO2 harvesting kit (does not include glass canning jars)
SKU 3210

Jaybird CO2 Harvester Kit

304 Stainless Steel

(supply your own canning jars)


Innovative and inexpensive way to gather and store CO2 during fermentation. Allows cold crashing of fermenter while replenishing the CO2 that was saved.

No backflush to ruin fermented product! No exposure to air!

Buy the kit and save some buck$ over purchasing the individual components.

Kit works with all wide mouth canning jars (sold separately). Enough hose is supplied in the kit to support up to 64 ounce (2 quart) canning jars.

Although this is a low temperature application we supply Hi-Temp tubing because it wont bend and kink like vinyl tubing does.


Kit includes the following components

         Krausen Catcher with 4 nipples (SKU# 2841) captures and stores CO2 during fermentation

         Krausen Catcher with Airlock Grommet (SKU# 2840) acts as 3rd stage airlock

         28 inches of 3/8 inner diameter Hi-Temp Silicone Tubing (SKU# 0396)

         2 x Wide Mouth Canning Jar Silicone Gaskets (SKU# 2770)

         Double-bubble airlock (SKU# 0196)

         Metal components are 304 Stainless Steel


YouTube Video: CO2 Harvester Kit

Average rating:
average rating 91%
7 reviews

Featured positive reviews:

average rating 60%
Mixed bag results 02/06/2019
By Frostman
I bought the CO2 Harvester Kit to replace a nearly identical rig that I’d designed myself. I used gallon plastic jugs and a variety of bulkhead fittings and O-rings in my design. I used it once and it didn’t push the StarSan out of the first jug into the second as I’d hoped. I had the same result with this kit using 64 ounce Mason jars. The CO2 from a very active fermentation doesn’t push the StarSan into the end Mason jar. I suspect this is due to the fact that I am using a Big Mouth Bubbler as my primary fermentation vessel. I will give the CO2 Harvester Kit another shot with my next batch using a glass carboy in lieu of the Big Mouth Bubbler. The previous batch with the BMB I used a big blowoff tube and it didn’t seal at all. I had krausen burping out around the vinyl blowoff tube that I’ve always used in my glass carboys. Guess I need to go back to the old school method. In my experience, plastic repeatedly sucks as a primary fermenter vessel.
average rating 80%
CO2 Harvester Kit 02/06/2018
By John Pumphrey
The CO2 Harvester Kit works as advertised and is of high quality. I used the lids with 1-litre jars and this provided ample CO2 to offset the volume (suck back) into the Catalyst fermenter while cold crashing from a higher fermentation temp (72F). I'm really pleased. The kit seems a bit expensive for what it is, but I'm very satisfied with the quality. Recommended.
average rating 100%
It does what its supposed to 06/22/2021
By Stephen T Gabriel
This kit does what its supposed to. When I cold crash I don't tend to get much in the way of suck back into the co2 cannister but I know its air tight as I applied negative pressure and it pushed the sanitizer from the second cannister to the first. I plan to use this till I move to pressurized fermentation.

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