Category Archives: Airlocks

Back In Stock… Brew Hardware – The Cold Crash Guardian – No Oxygen Cold Crash Blowoff!

cold crash guardian

The Cold Crush Guardian via Brew Hardware

More Info

From the product description, check product page for current description, price and availability:

Cold crash what? It’s the Cold Crash Guardian!

If you ferment in a temp controlled environment and enjoy the benefits of cold crashing, the inevitable problem is that the cooling in the fermenter creates a vacuum. The worst case scenario is that the liquid from your airlock or blowoff container gets sucked back into the beer and some portion of air from within the refrigerator is also drawn in. This has both contamination and oxidation effects on the beer even if you haven’t noticed it yet. If you’ve jumped on the New England IPA craze, even tiny amounts of oxygen will destroy that beer, and to some degree all other beers.

There are finally increasing discussions being had on this topic and when it is brought up, those concerned are often told not to worry about it or offered solutions that don’t really work. Scroll to the bottom to read about some of these misguided solutions. Some vendors are coming up with products but they are comparatively very expensive and most certainly do not reserve enough CO2. Do it yourselfers are experimenting with white bread bags and balloons, but they don’t offer longevity or confident seals. In full transparency, we’ve also struggled with the materials**and design of this solution since we started working on it. We took some time off, worked on new prototypes and have come up with a version that should last a long time and deals with most challenges we came across.

What you get (at the moment the main product picture is not accurate though the video below IS):
This simple but effective kit includes your choice of either a 1 gallon or 2.5 gallon expandable bladder. The 1 gallon is suitable for up to 3 gallon batches while the 2.5 is suitable for up to 10 gallon batches.
The bladder has a valved hose connection.
A nylon double sided 3/8″ hose barb to connect your fermenter’s grommet or carboy cap (you provide) to the included hoses that connect to the bladder as well as a blow off.
One barbed one way check valve. More on that below.
3 ft of 3/8″ ID PVC tubing
3/8″ Stainless Steel hose barb TEE

In summary, the overall layout has a hose coming from your fermenter, splits via an included hose barb TEE. One port of the tee goes to the valved bladder input via a piece of hose. The other port of the tee goes to the one way check valve via a short piece of hose. Optionally a piece of hose can continue on into a jar of starsan (you can end the system at the one way check valve but you won’t have any visual/audio indication of fermentation activity because nothing bubbles.

How it works:

First, you’ll start your fermentation with a standard blow off hose if your fermenter type typically has yeast and chunkage blowing off. The cold crash guardian can handle some blowoff but it’s a mess that can be avoided.

After the peak wave of fermentation is over, the krausen is diminishing, and the risk of blow off is over, you’ll install the cold crash guardian to your fermenter’s output with the collection bag completely deflated and the connect valve in the closed position.

Allow some time to pass, at least a minute or so, to allow the CO2 to purge the oxygen out of the lines. Then open up the valve on the collection bag. CO2 will start flowly filling the collection bag. Excess pressure is vented through the one way check valve. The check valve vents at half of a psi and if you attach a tube, you will see bubbles through the starsan in your catch container.

Once fermentation is over and you set your fermentation temp controller to COLD, the vacuum created in the fermenter will start to draw the CO2 out of the inflated bag as necessary. In most cases, the bag will deflate by approximately 1/2 to 1 gallon when the beer hits the mid 30F. As days pass at this cold temp, an additional gallon or so will be consumed. Due to the check valve’s use, no starsan will draw up the tubing. More importantly, only CO2 will be drawn back into the headspace. No oxygen, no starsan, no bacteria.

Typical solutions offered on brewing forums:

I just plug up my fermenter so that the vacuum cannot draw anything in.
If your fermenter can hold up to the vacuum without damage or sucking your stopper down the hole, the problem is that you will eventually need to unseal it. Once the stopper is removed, oxygen rich air gets drawn in. Also don’t discount how damaging vacuum can be. You can crease PET fermenters this way. You can also implode stainless tanks.

I just use an S-style airlock because it will pass gas both directions without draining starsan back in.
The only problem this prevents is the contamination of beer with whatever liquid you have in the airlock. It does not stop oxygen.

Who cares if Starsan is drawn into the beer, it’s safe enough to drink.
There are endless safe things you can add to your beer that would make it taste bad. Stop.

I never had a problem with contamination or oxidation.
Some beers are more or less susceptible to off flavors/oxidation problems and some people have higher thresholds for detecting those problems. If you are completely happy with your beer despite less than ideal practices, this product is not for you.

I hook up my CO2 tank and set it to less than 1 PSI to push in CO2 when the vacuum is formed.
This is indeed how the pros handle it and of course it works. At a homebrew scale there are a few things to keep in mind. First you do need a CO2 tank, a good regulator that doesn’t drift, and a fermenter that is 100% sealed. If you have even a slow leak in the fermenter seals, kiss that whole tank of CO2 goodbye. If your regulator drifts even a couple PSI (due to being borrowed out of your cold kegerator), you can compromise your fermenters due to overpressurization. If you have multiple fermenters in various locations, you’d need either multiple CO2 setups or long hoses.


 

  • Availability of this has been touch and go at best.
  • If you see it in stock, I suggest purchasing sooner rather than later.
  • If it’s not in stock… this is something we keep a close eye on.  Connect with Us to stay in the loop and we’ll let you know when it’s available again.

COLD CRASH GUARDIAN – NO OXYGEN COLD CRASH BLOWOFF

Also Consider: Oxygen Free Cold Crash and Transfer Using a Spunding Valve

More Fermentation Related!

More: Recent Great Deals

Price, promotions and availability can change quickly Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this post was published; however, they may differ from those you see when you visit the product page.  Check the product page for current price, description and availability pst:bhccg

Oxygen Free Cold Crash and Transfer Using a Spunding Valve

100 x Food Grade Silicone Airlock Grommets… $6.99 + Free Prime Ship

Airlock Grommet, Fermenter Lid Grommet Silicone Grommets for Homebrewing, Straws, Airlock, Beer, Mead, Wine, Silicone Bucket Fermenter Lids, 5/8 Inch OD and 3/8 Inch ID (100)

Airlock Grommet, Fermenter Lid Grommet Silicone Grommets for Homebrewing, Straws, Airlock, Beer, Mead, Wine, Silicone Bucket Fermenter Lids, 5/8 Inch OD and 3/8 Inch ID (100)


From the product description, check product page for current description, price and availability:

  • FERRODAY airlock grommet is made of food grade silicone, not only safe but also durable.
  • Easy installation into a bucket lid and provides a good seal for fermenting.
  • Grommets great fit for 15 25,30 and 60 liter fermenter.
  • Air tight seal for your fermenter, better condition for fermenting.
  • Package:20pcs

Use to add an airlock port to a container of your choosing.  I know of several grommet offerings, most don’t claim to be food grade.  That’s probably not a big deal considering that most of the time this gets little to no contact with your beer.  Having said that, it’s nice to have a food grade option.

Note: Multiple variations of this product may be available, as such a different version may appear at this link – I’ve seen the 100 count offering of this sell out and the product page default to a lower count offering.  Double check the product page to make sure it’s showing 100 count.

10/3/20 2 OM Central: These are selling for just $6.99.  Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices, shipping and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this post was published; however, they may differ from those you see when you visit Amazon. Check the product page for current price, description and availability.

Airlock Grommet, Fermenter Lid Grommet Silicone Grommets for Homebrewing, Straws, Airlock, Beer, Mead, Wine, Silicone Bucket Fermenter Lids, 5/8 Inch OD and 3/8 Inch ID (100)note that multiple variations of this product may be available, as such a different version may appear at this link


More Fermentation Related!

More: Recent Amazon Finds

SIX x 3 Piece Fermentation Airlocks – now $7.65, $1.28 Each + Free Prime Ship

homebrew airlocks

6 x 3 Piece Fermenter Airlocks


From the product description, check product page for current description, price and availability:

  • Airlock, three piece airlock, wine bubbler, beer bubbler
  • Simple to use
  • Easy to clean

9/20/20 2 PM Central: These are selling for $7.65.  Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying orderPrices, shipping and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this post was published; however, they may differ from those you see when you visit Amazon. Check the product page for current price, description and availability. Also: Recent Amazon Finds and Amazon Fillers Resource Page 

Home Brewing Supplies 48-9AJX-W965 Econolock-6pk Airlock, Clear – note that multiple variations of this product may be available, as such a different version may appear at this link


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More: Recent Amazon Finds

Hands on Review: Kegland BlowTie Diaphragm Spunding Valve – new updates!

A Spunding Valve allows you to maintain a set pressure. If pressure in the vessel exceeds the set point, it is expelled. It generally consists of an adjustable PRV valve, a tee, a gauge and a way to connect to your keg.

Why a Spunding Valve?

There are loads of homebrew related applications for a Spunding valve ranging from pressurized ferementation to naturally carbonating to fixing over carbonated beers and lots more.  Check out our resource post on the subject.  It’s arguably the go-to resource on the Internet on the subject


Update: New Kegland BlowTie v2!

Since this review was published, BlowTie v2 has been released.  The major improvement is… a built in gauge.  Look for an update to this review in the future.  General concepts should remain the same.  I recommend purchasing the newer v2.


Hands on Review Kegland BlowTie Spunding Valve

The BlowTie Spunding Valve assembly consists of the BlowTie, a DuoTight Tee Fitting, a DuoTight to flare fitting, a DuoTight pressure gauge and two small pieces of EVABarrier Tubing.

Here’s a look at each component…


Compare Prices, Review Continues Below:

Parts lists for putting this together on your own can be found toward the end of this review


The BlowTie is the heart of this build.  It has DuoTight Push to Connect connections on both side as well as an adjustment knob to set pressure.  Related: DuoTight Hands on Review. Continue reading

Back In Stock… Brew Hardware – The Cold Crash Guardian – No Oxygen Cold Crash Blowoff!

cold crash guardian

The Cold Crush Guardian via Brew Hardware

More Info

From the product description, check product page for current description, price and availability:

Cold crash what? It’s the Cold Crash Guardian!

If you ferment in a temp controlled environment and enjoy the benefits of cold crashing, the inevitable problem is that the cooling in the fermenter creates a vacuum. The worst case scenario is that the liquid from your airlock or blowoff container gets sucked back into the beer and some portion of air from within the refrigerator is also drawn in. This has both contamination and oxidation effects on the beer even if you haven’t noticed it yet. If you’ve jumped on the New England IPA craze, even tiny amounts of oxygen will destroy that beer, and to some degree all other beers.

There are finally increasing discussions being had on this topic and when it is brought up, those concerned are often told not to worry about it or offered solutions that don’t really work. Scroll to the bottom to read about some of these misguided solutions. Some vendors are coming up with products but they are comparatively very expensive and most certainly do not reserve enough CO2. Do it yourselfers are experimenting with white bread bags and balloons, but they don’t offer longevity or confident seals. In full transparency, we’ve also struggled with the materials**and design of this solution since we started working on it. We took some time off, worked on new prototypes and have come up with a version that should last a long time and deals with most challenges we came across.

What you get (at the moment the main product picture is not accurate though the video below IS):
This simple but effective kit includes your choice of either a 1 gallon or 2.5 gallon expandable bladder. The 1 gallon is suitable for up to 3 gallon batches while the 2.5 is suitable for up to 10 gallon batches.
The bladder has a valved hose connection.
A nylon double sided 3/8″ hose barb to connect your fermenter’s grommet or carboy cap (you provide) to the included hoses that connect to the bladder as well as a blow off.
One barbed one way check valve. More on that below.
3 ft of 3/8″ ID PVC tubing
3/8″ Stainless Steel hose barb TEE

In summary, the overall layout has a hose coming from your fermenter, splits via an included hose barb TEE. One port of the tee goes to the valved bladder input via a piece of hose. The other port of the tee goes to the one way check valve via a short piece of hose. Optionally a piece of hose can continue on into a jar of starsan (you can end the system at the one way check valve but you won’t have any visual/audio indication of fermentation activity because nothing bubbles.

How it works:

First, you’ll start your fermentation with a standard blow off hose if your fermenter type typically has yeast and chunkage blowing off. The cold crash guardian can handle some blowoff but it’s a mess that can be avoided.

After the peak wave of fermentation is over, the krausen is diminishing, and the risk of blow off is over, you’ll install the cold crash guardian to your fermenter’s output with the collection bag completely deflated and the connect valve in the closed position.

Allow some time to pass, at least a minute or so, to allow the CO2 to purge the oxygen out of the lines. Then open up the valve on the collection bag. CO2 will start flowly filling the collection bag. Excess pressure is vented through the one way check valve. The check valve vents at half of a psi and if you attach a tube, you will see bubbles through the starsan in your catch container.

Once fermentation is over and you set your fermentation temp controller to COLD, the vacuum created in the fermenter will start to draw the CO2 out of the inflated bag as necessary. In most cases, the bag will deflate by approximately 1/2 to 1 gallon when the beer hits the mid 30F. As days pass at this cold temp, an additional gallon or so will be consumed. Due to the check valve’s use, no starsan will draw up the tubing. More importantly, only CO2 will be drawn back into the headspace. No oxygen, no starsan, no bacteria.

Typical solutions offered on brewing forums:

I just plug up my fermenter so that the vacuum cannot draw anything in.
If your fermenter can hold up to the vacuum without damage or sucking your stopper down the hole, the problem is that you will eventually need to unseal it. Once the stopper is removed, oxygen rich air gets drawn in. Also don’t discount how damaging vacuum can be. You can crease PET fermenters this way. You can also implode stainless tanks.

I just use an S-style airlock because it will pass gas both directions without draining starsan back in.
The only problem this prevents is the contamination of beer with whatever liquid you have in the airlock. It does not stop oxygen.

Who cares if Starsan is drawn into the beer, it’s safe enough to drink.
There are endless safe things you can add to your beer that would make it taste bad. Stop.

I never had a problem with contamination or oxidation.
Some beers are more or less susceptible to off flavors/oxidation problems and some people have higher thresholds for detecting those problems. If you are completely happy with your beer despite less than ideal practices, this product is not for you.

I hook up my CO2 tank and set it to less than 1 PSI to push in CO2 when the vacuum is formed.
This is indeed how the pros handle it and of course it works. At a homebrew scale there are a few things to keep in mind. First you do need a CO2 tank, a good regulator that doesn’t drift, and a fermenter that is 100% sealed. If you have even a slow leak in the fermenter seals, kiss that whole tank of CO2 goodbye. If your regulator drifts even a couple PSI (due to being borrowed out of your cold kegerator), you can compromise your fermenters due to overpressurization. If you have multiple fermenters in various locations, you’d need either multiple CO2 setups or long hoses.


 

  • Availability of this has been touch and go at best.
  • If you see it in stock, I suggest purchasing sooner rather than later.
  • If it’s not in stock… this is something we keep a close eye on.  Connect with Us to stay in the loop and we’ll let you know when it’s available again.

COLD CRASH GUARDIAN – NO OXYGEN COLD CRASH BLOWOFF

Also Consider: Oxygen Free Cold Crash and Transfer Using a Spunding Valve

More Fermentation Related!

More: Recent Great Deals

Price, promotions and availability can change quickly Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this post was published; however, they may differ from those you see when you visit the product page.  Check the product page for current price, description and availability pst:bhccg

Oxygen Free Cold Crash and Transfer Using a Spunding Valve

12 x 3 Piece Fermentation Airlocks

12 PACK QRP 3-Piece Fermentation Airlocks

12 PACK QRP 3-Piece Fermentation Airlocks


From the product description, check product page for current description, price and availability:

  • Exceptional Quality
  • QRP 3-piece Airlocks supersede the S-Curve Style Bubble Airlock: they are sturdier and easier to keep clean

Related: Silicone Airlock Grommets via Valuebrew

12 PACK QRP 3-Piece Fermentation Airlocks – note that multiple variations of this product may be available, as such a different version may appear at this link


More Fermentation Related!

More: Recent Amazon Finds

XL Extra Large 3 Piece Airlock – $1.99 + Free Ship Eligible, Limited Availability

Airlock - 3 Piece (XL) FE370XL

Airlock – 3 Piece (XL) via MoreBeer

More Info

From the product description, check product page for current description, price and availability:

This oversized 3-piece airlock can hold 50% more water or sanitizer so your airlock is less likely to evaporate dry or get sucked dry. When the temperature drops, your fermenter will suck in solution from the airlock, and if the temperature drop is significant the airlock can be completely emptied. An empty airlock opens the door for airborne spoilants to make their way into your fermenter unchecked. The extra large 3-piece airlock offers your fermenter even more protection, and is especially useful when cold crashing.

While a simple device not all airlocks are the same. Some other designs have only a couple holes in the plastic lid and this can cause the airlock to pop out during an active fermentation. Just like our normally sized airlock, our design features many holes in the lid that allow CO2 to escape easily. Additionally some other airlocks have a cross hatch design on the bottom while our is open to allow Krausen foam to enter the airlock if necesary. Better to clean your airlock out than to find it laying on the floor next to your fermenter 3 days later.

Another cool feature of this 3-piece airlock is that 1/2″ ID tubing will fit onto the center post for use as a blowoff. This can be handy if you have a really active ferment that is blowing out the top of your fermenter.

Please Note: Airlock only – stopper not included.


 

Limited Availability Deal of the Day: As of this posting, this is marked down to $1.99 as a MoreBeer Deal of the DayShipping is also free to addresses in the contiguous US with most $59 Orders. Availability: This is available today only, while supplies last. Quantities are limited. Check the MoreBeer’s Deal of the Day to check today’s offering.

Product Description – Here – Use coupon code BEERDEAL to get this discount.

Airlock – 3 Piece (XL) FE370XL

More Fermentation Related!

MoreDeals! at MoreBeer:

More: Recent MoreBeer Finds

Looking for a MoreBeer Deal? – Today’s Deal of the Day | Sale Items | MoreBeer Deals

20 x Food Grade Silicone Airlock Grommets – $7.99, 40 Cents Each + Free Prime Ship

Ferroday Airlock Grommet for Airlock On Homebrew Beer Mead Wine Fermenter Lid- Food Grade

Ferroday Airlock Grommet for Airlock On Homebrew Beer Mead Wine Fermenter Lid- Food Grade


From the product description, check product page for current description, price and availability:

  • FERRODAY airlock grommet is made of food grade silicone, not only safe but also durable.
  • Easy installation into a bucket lid and provides a good seal for fermenting.
  • Grommets great fit for 15 25,30 and 60 liter fermenter.
  • Air tight seal for your fermenter, better condition for fermenting.
  • Package:20pcs

Use to add an airlock port to a container of your choosing.  I know of several grommet offerings, most don’t claim to be food grade.  That’s probably not a big deal considering that most of the time this gets little to no contact with your beer.  Having said that, it’s nice to have a food grade option.

7/19/20 8 AM Central: These are selling for just $7.99. That’s the best historical third party Amazon price I found, notwithstanding Lightning Deals or coupons. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices, shipping and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this post was published; however, they may differ from those you see when you visit Amazon. Check the product page for current price, description and availability.

Ferroday Airlock Grommet for Airlock On Homebrew Beer Mead Wine Fermenter Lid- Food Grade – note that multiple variations of this product may be available, as such a different version may appear at this link


More Fermentation Related!

More: Recent Amazon Finds

FIVE x Three Piece Airlocks

3 Piece Plastic Airlock (Sold in sets of 3)

Set of 5 Three Piece Airlocks.  Use on your fermenter to help prevent outside air from backflowing.

3 Piece Airlock (Qty. 5)


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More: Recent Amazon Finds

12 x Silicone Airlock Grommets

12 PCS Airlock Grommet, Fermenter Lid Grommet,Silicone Grommets For Mason Jars/Airlock/Straws/Plastic Bucket Fermenter Lids,5/8" OD & 3/8" ID (fermenter grommet)

12 PCS Airlock Grommet, Fermenter Lid Grommet,Silicone Grommets For Mason Jars/Airlock/Straws/Plastic Bucket Fermenter Lids,5/8″ OD & 3/8″ ID (fermenter grommet)

More Info

From the product description, check product page for current description, price and availability:

  • Food Grade Silicone ★ The airlock grommet is made of thicker silicone and PBA free. It features a higher quality. Also our silicone grommet is high-temperature resistant. It can withstand Not over 300 ℉
  • Good Sealing ★ This silicone grommet work with the airlock, it makes a perfect air-tight seal to keep bugs/bacteria/ oxygen from getting in your fermenter.That will help maintain the ferment for a longer period
  • Fit For 5/8″ Hole ★ External diameter is 5/8″(15.93mm). Internal diameter is 3/8″(9mm). Height is 0.3 inch(8mm). Need to drill a 5/8″ hole in a fermenter lid. And then this airlock grommet is easily insert in lid hole
  • Widely Application ★ The fermenter grommets are great for airlocks & plastic buckets lids & straws.Use these silicone grommet to convert mason jars to air locked fermentation vessels

 

Use to add an airlock port to a container of your choosing.

12 PCS Airlock Grommet, Fermenter Lid Grommet,Silicone Grommets For Mason Jars/Airlock/Straws/Plastic Bucket Fermenter Lids,5/8″ OD & 3/8″ ID (fermenter grommet) – note that multiple variations of this product may be available, as such a different version may appear at this link


More Fermentation Related!

More: Recent Amazon Finds