Frequently Asked Questions

Can I use this if I carbonate in the bottle? Will this filter out the yeast?

Yes, you can use this if you bottle. No it will not filter out the yeast.

The filter that comes with the Bouncer is 20 gauge (915 microns), which will not filter out the yeast.

What does get filtered out:

  • larger particles
    • hops
    • crusty krausen chunks
    • clumps of spent yeast
    • your stud earring that you dropped in the fermenter 🙂
  • smaller particles
    • sediment
    • proteins

The smaller particles are more effectively filtered as the larger particles build up in the filter.

On some beers, we have seen gelatin-like clear goo line the inside of the filter. This appears to be proteins that stick to the stainless steel mesh. This material was completely invisible to the naked eye in the beer.

Category: Bouncer Usage

What is the maximum operating temperature of the Bouncer?

Short answer: 125 degrees Fahrenheit.

Long answer: it depends.

We don’t recommend using the Bouncer above 125 degrees Fahrenheit.

We don’t recommend heat sterilizing the Bouncer.

The manufacturer gives these specs:

  • 150 PSI at 70 degrees Fahrenheit
  • 100 PSI at 125 degrees Fahrenheit

We designed the bouncer for typical home brewing applications. This means:

  • low pressure ( less than 20 PSI)
  • low temperatures (less than 100 degrees Fahrenheit)


Heat sterilizing may deform the plastic so that the filter would not function.

Category: Bouncer Usage

When is the Mac Daddy going to be available?

They are available now!

Go find them at a store near you with our store locator.

Or if you aren’t that lucky, buy them an online from a source near you.


Category: Purchasing

What’s the difference between the Regular Bouncer and the Mac Daddy Bouncer?

The Regular Bouncer was designed for your average home brewer.

  • Works great on typical five gallon batches of most beers.
  • Attaches directly to your standard auto-siphon tubing with 3/8″ hose barbs
  • Gravity-fed. No pumps or pressure needed

The Mac Daddy Bouncer was designed for the more serious home brewer.

  • Works great on batcher bigger than five gallons
  • Handles more trub with its larger screen area – more hops, more yeast, more proteins, etc.
  • Flows faster
  • Fits your equipment. 1/2″ female machine threads with included 3/8″ and 1/2″ hose barbs means it will fit all standard equipment: hoses and quick connect adapters
Regular Bouncer Mac Daddy Bouncer
Use most 5 gal batches big batches with heavy hops
connectors 3/8″ hose barb 1/2″ female pipe thread
w/ 1/2″ and 3/8″ hose barb adapters
filter area 7.71 square inches 17.33 square inches
flow rate about 1 gallon per minute about 2.5 gallons per minute


Category: Purchasing

I see bubbles in the filter. Is this air? What about oxidation?

This is carbon dioxide, not air.

Coming out of the fermenter, your beer is very lightly carbonated. Yeast has been happily munching the fermentables in the wort, producing alcohol and carbon dioxide (CO2). Some of that gets expelled through your air-lock, but some of that also goes into solution in your beer. If you don’t believe, taste a little, and you’ll feel the slight carbonation on your tongue. You’ll also find that when using the Bouncer out of kettle, you won’t see any bubbles in the filter.

When you pass your beer through the stainless steel mesh on the bouncer, the slight turbulence causes that CO2 to come out of solution. And since the bouncer is a closed filter, that CO2 is trapped in the filter.

Depending on the beer (gravity, yeast, malt bill, hops, etc.) this can be quite noticeable, and on a slowly flowing siphon, can actually cause you to lose the siphon. This happens more often when the CO2 bubble gets large. To lessen those chances, periodically lift the Bouncer so that the inlet/outlet are horizontal, and the CO2 bubble will be drawn through the siphon.

What about oxidation? Well, since CO2 is getting trapped in the closed filter, it also means that air is NOT getting into the filter. So, using the Bouncer will not increase oxygen in your beer.

However, oxidation of your beer out of the fermenter is a real thing, and can significantly change the taste of your beer. You should still try to minimize it by:

  • Try not to splash the beer as it flows into your bottling bucket, keg, secondary, or other target vessel. It helps to have a tube that extends to the bottom of your target vessel.
  • If you have a CO2 tank, add some CO2 to your target vessel. It is heavier than air and will create a layer of CO2 on the beer which will act as a barrier to the oxygen in the air.
  • If you are racking into a keg, “burp” the keg by adding CO2, then using the pressure release. Do this several times. This will help purge the keg of the remaining air, replacing it with Co2.
Category: Bouncer Usage