Ball, Kerr, Mason canning jar krausen catcher with 4 nipples top view
Ball, Kerr, Mason canning jar krausen catcher with 4 nipples top view
Tri-Clover Ball, Kerr, Mason canning jar 4 nipple krausen catcher full view

Canning Jar Krausen Catcher with 4 Nipples

Average rating:
average rating 97%
Wide-mouth Ball, Kerr, or Mason canning jar krausen catcher with 4 x 1/2" nipples
SKU 2841

Jaybird™ Krausen Catcher with 4 Nipples

for Ball, Kerr, or Mason Wide-Mouth Jar

304 Stainless Steel


One-of-a-kind Krausen Catcher for your fermenter is the ultimate airlock replacement / blow-off tube!

·         Ever experience a crazy fermentation where krausen plugs your airlock or blow-off tube?

·         Ever check on an airlock and find (gasp!) that it has dried out? Or worse yet… back-flushed into your fermenting wort?

·         Ever have a blow off tube slip out of the blow off container (and therefore out of sanitizer solution)?

·         Ever have the blow-off container dry out of sanitizer solution - or get knocked over - exposing the blow-off tube to room air (and all the junk that floats in it)?

The Krausen Catcher fixes ALL those issues by providing sturdy hose attachments, a lid-sealed containment system, and the ability to attach 1/2" hoses to any of its 4 connections!

Think of this as a GIANT 3-piece airlock… with all of the benefits and none of the draw-backs!

All you need is a couple of feet of 1/2" inner diameter tubing and a wide mouth Kerr, Ball, or Mason jar (sold separately) in the 16, 32, or 64 ounce size.

DAISY CHAIN THIS WITH OUR GROMMETED VERSION OF THE KRAUSEN CATCHER (SKU# 2840) to create a CO2 harvesting, back flow-preventing airlock (see SKU# 3210, and the video below).


1.    Fill a wide-mouth canning jar (not included) with the proper amount and mix of sanitizing solution

2.    Place a length of tubing over one of the “inside” nipples of the Krausen Catcher. Tube length should be long enough to “almost” reach the bottom of the canning jar once canning jar lid is attached to jar.

3.    Place Krausen Catcher on canning jar and tighten the canning jar’s lid over the Catcher

4.    Attach a half-inch inner diameter hose over the same-side outside nipple on the Krausen Catcher

5.    Run the other end of the hose to the CO2 exit port of your fermenter


·         304 Stainless Steel

·         1/2" inner diameter tubing connects to any of the 4 nipples

·         Works with any “wide mouth” (3-inch inner opening) Ball, Kerr, Mason or equivalent canning jar

PLEASE NOTE: 1/2” inner diameter tubing refers to VINYL tubing. You can use 3/8” inner diameter SILICONE tubing instead, since it stretches nice and holds tight.

PLEASE NOTE: Canning jar, screw lid, hose, etc. are for illustration purposes only, and are not included!

WE WILL SOON OFFER COMPLETE Jaybird™ Ultimate Krausen Catcher Kits in 16, 32, and 64 ounce sizes. These expanded kits will include the canning jar, screw lid, and 2 feet of 1/2" tubing. Check back and search for “Krausen Catcher” in our online store.


YouTube Video: CO2 Harvester Kit

Average rating:
average rating 97%
7 reviews

Featured positive reviews:

average rating 100%
Krausen Catcher 03/22/2018
By Zack
This is the 2nd one of these that I have bought. Love these things and they'll last forever! No more water being sucked back into the fermenter while cold crashing!
average rating 100%
Exactly what I was looking for 01/23/2017
By Jon
I have had problems when cold crashing of sucking sanitizer back into the fermenter. This is the perfect solution. Worked great on my first batch.
average rating 100%
Well made! 05/16/2017
By Joshua Crowley
Very nice build! Welds are clean. Have not had the opportunity to use the products but I am looking forward to using them!

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