William's .5 Micron Oxygen Aeration System

  • Item #S74
  • Price: $59.99
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Why aerate your wort? Yeast needs oxygen to reproduce and produce strong cell walls. If the cell walls are weak, the yeast will have a low tolerance for alcohol, and can die before fully fermenting out the wort. Particularly in worts with starting gravities in excess of 1.050, this can contribute to long lag times, slow ferments, and higher than normal finishing gravities. Like an air stone in a fish tank provides oxygen for fish to breathe, wort aeration provides needed oxygen for yeast respiration and growth.

 The advantage of the Oxygen Aeration System is that the wort can be aerated to 60% of its oxygen holding capacity in just 20 seconds, something that takes our Air Aeration System 5 minutes to accomplish. This shorter aeration means less foaming of the wort before pitching, an important consideration in higher gravity beers. This system includes a finer .5 micron aeration wand, for better oxygen distribution (although it is more likely to clog than the wider 2 micron stone).

Includes 22" Aeration Wand with a .5 micron stainless aeration stone, 4' of tubing, and an Oxygen Regulator for standard hardware store oxygen welding tanks. Pictured red oxygen bottle is not included, these disposable 1.4 and 2.1 ounce left hand thread bottles can be purchased at any hardware store in the welding or brazing section. One bottle will aerate 20 to 30 batches. Pictured glass carboy is not included.

Why buy a William's Oxygen Aeration System?  It has a 22" U.S. made stainless wand, longer than any other system, so you can easily reach the bottom of a 5 or 6 gallon fermenter without dipping the plastic tubing into the wort.  You can choose between the slightly more efficient .5 micron stone, or the easier to maintain 2 micron stone. 

Unlike other Oxygen Aeration Systems, which feature imported regulators and wands, all parts are made in U.S.A.

(13)
Average rating 9.84615384615385 out of 10 ( based on 13 reviews )

Tiny Bubbles ... :)

Review by Scott on 9/2/2014

Works as advertised, with readily available oxygen canisters from the hardware stone. No worries about excessive foaming, even with longer bursts (30 seconds). Works great for larger yeast starters (1200 ml and larger), and soooooo much easier and more effective when adding O2 to cooled wort. My BACK says "thank you" for not having to try and swirl 6-gallons of wort in a glass carboy!! Primary fermentation typically starts within 2-6 hours now, instead of 8-24. That's a huge improvement at such a critical stage. Stainless wand is super easy to clean & sanitize, and the plastic tubing never touches your wort. Don't brew another batch without O2 ... stop hesitating and order this, already!!

great thing

Review by Joe on 3/26/2015

this is way better than just a tube with a stone

Best way to oxygenate

Review by David on 3/27/2015

Adding oxygen to the wort greatly improved my fermentation and final beer quality. This is by far the best and a very easy way to add oxygen. Shaking the carboy doesn't do any good. I recommend keeping the oxygen flowing so that wort doesn't infiltrate the stone. It is important to keep the stone clean. And do not touch the stone--oils from your fingers can clog the openings.

William's .5 micron Oxygenation Aeration System

Review by MVasquez on 11/16/2015

Adding oxygen to my cooled wort improved my fermentation greatly. I will also use them for my yeast starters. When yeast is in the respiration phase, they need oxygen to multiply and get you fermentation going and finish completely. This is a great addition to my home brewery and would recommend it to anyone. Well done.

A world of difference

Review by Mark on 11/25/2015

I used this for the first time on a big xmas ale. Made a big difference as the yeast hit the ground running. I highly recommend it. I'm going to use it on everything I make.

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Nov 06, 2019 by Ian

Q: What are the outer and inner diameters of the oxygen wand tubing? Also, what is the barb size on the oxygen valve assembly? Thanks!

A: The inner diameter of the tubing is .170" and the outer diameter is .230". The barb is .1875"


Jul 30, 2018 by Robert

Q: You have a 2 micron and a .5 micron. What are the usage requirements for either of these? Does it just come down to taste, or do certain beers require one over the other?

A: The .5 micron can only be used for oxygen and can clog a bit easier. The 2 micron is a bit easier to maintain and can also be used with air/aquarium pumps, but is a bit less efficient.


Mar 31, 2018 by Connor Coffman

Q: When using this is there any way to measure how much pressure is being used? Or do you just turn the release valve completely open?

A: You just open the valve and adjust it by watching how many bubbles are coming out of the stone on the wand. There are no pressure settings.


Feb 09, 2017 by Will

Q: How do you recommend sanitizing the wand and stone? Does the tubing need to be sanitized as well?

A: We clean with hot water and sanitize with Star San or similar solution. Or you can immerse the stone in boiling water for a couple of minutes.. We do not sanitize the tubing but you could rinse with a star San solution if you like.


Nov 22, 2016 by Dustin

Q: Can the aeration stone be removed and replaced once clogged?

A: The stone cannot be removed but can be unclogged by soaking in cleanser or boiling in some water.


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