Sale!

Silicone Fermentation Airlock Valve Lid for Wide Mouth Mason Jars

$4.99 $1.99

This first batch of valve lids is not up to our quality standards, so we are selling off the initial batch at a deep discount and working with the factory to fix them. There are 2 problems with this batch of lids:
1. They are a little too small. You need to be careful to center them inside the metal band when you tighten it. If they are all the way to one side, they can come loose.
2. The slit was supposed to be cut 8mm, but the factory only cut a pinhole. The slit need to be cut with a razor blade or sharp knife. I recommend 8mm, which is about half the size of the “bubble.”
Despite these flaws, the lids do work once you cut the slit.

Our silicone valve lid for wide mouth (3″ internal diameter) Mason jars will revolutionize your small batch fermentation in Mason jars! The “bubble” on the top has a slit cut in it. When pressure builds up in the jar, the lid inflates like a balloon. This automatically opens the slit and lets the CO2 produced by fermentation escape, without letting outside air in. No more burping and no more topping up the water in the airlock!

Attach them using any existing band / ring. Our stainless steel bands work the best – rust can stain silicone.

Made of 100% silicone rubber, these lid inserts are dishwasher, freezer, and microwave safe! Silicone is a safe, green, non-plastic (BPA free) material for food use that does not leach any chemicals.

One lid per order, bands and jars sold separately.

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Product Description

For now we only have these in white / clear color and yellow. We will be getting them in our other signature colors.

This one way valve lid lets fermentation gasses escape, while preventing oxygen from getting in. This greatly reduces your chances of getting mold or kahm yeast in your ferment.

Additional Information

Choose Color

Lemon Yellow, White

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