The PLAATO Valve V2 - Pressure Drop Equalizing Valve

Connecting between your fermenter and airlock/or blow-off-tube, it equalizes any negative pressure that might be present in the system, eliminating suckback.

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Read why PLAATO Valve is the ultimate solution to suckback.


We are confident that you’ll love PLAATO Airlock. Try it for 30 days and in the unlikely event that you want to return it, we offer a free return and a full refund.

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Here's how it works:

When you receive your order, you will have 30 days to decide if you wish to keep your PLAATO Airlock. If you decide to return your PLAATO Airlock, just follow the steps below:

1. Let us know that you wish to return your product.

2. Attach the pre-paid shipping label, and hand it in to your local post office.

3. We'll issue a full refund as soon as we have received the PLAATO Airlock.

This makes it risk-free to try PLAATO Airlock.

David Heath Review

"This product should be used on every fermentation for every homebrewer"


Eliminates Suck-back
During Fermentation & Cold Crash

Empty Airlock Protection
No suck-back minimizes the chance of an empty airlock & air entering
Transfer protection
Lets you keep the airlock on while transferring

How it works

Many brewers experiences suddenly empty airlocks, or water flowing from the blow-off vessel to the fermenter. This phenomena is due to temperature changes that in turn lead to negative pressure in the fermenter. This is seen the moment a fermenter is placed in a temperature controlled room after pitching of yeast, or during cold crash. To offset this negative pressure, the fermenter will either suck in water from an airlock, or suck in air, or in some rare cases implode under the forces of this pressure. In most cases air will be introduced in the fermenter in the hours before the fermentation starts, and during cold crash. PLAATO Valve has an incorporated umbrella silicon valve that only opens if a negative pressure occurs, bypassing the airlock and hence eliminating suckback.

Especially developed for brewers

The PLAATO Valve is made out of FDA-approved food grade PP and has an incorporated umbrella silicon valve as working principle. It comes ready with optional 65PPI activated carbon filters for the inlet (16pcs), and fits most airlocks and fermenters.

Oxygen-free fermentation

As stated above, rapid changes in temperature will always introduce air, water or partial implosion in/to the fermenter. In order to obtain a non-oxidizing atmosphere, the headspace in the fermenter must therefore be flushed with CO2.

  • For cold-crash, the oxygen in the headspace is already replaced by CO2, so introduction of small amounts of oxygen is not a significant source of oxidation.

  • If you are aiming for an oxygen-free fermentation, the Plaato valve is designed to be connectable to a bag containing CO2/inert gas, maintaining a non-oxidizing atmosphere in the fermenter.


See our Limited Bundle with PLAATO Valve included.


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Products can be thoroughly tested for 30 days
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