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The Fermtech thief is simply a plastic tube with a check valve in the bottom. When placed in liquid, such as beer or wine, the liquid will bypass the check and the thief will rise to the liquid level. Taking the thief out will cause the check valve to seat, allowing liquid to be taken out. A hydrometer can then be placed in the thief, or the liquid can be drained into a test jar by pushing the check up against the side of the jar. This makes taking a gravity reading a snap! It's also great for pulling samples of your beer/wine from your carboy or a barrel.

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The best way to take samples from the fermenter!
I don't know what I would do without my thief! It is easy to sanitize and use. Good for beer, wine, mead, cider, just about any fermented beverage! Simply dip your sanitized thief into your liquid and wait until the liquid flows up to the liquid line. You can then lift the sample out and either drop your hydrometer directly into the thief, or drain it into a sanitized test jar by pressing the tip against the side of the jar. I often use this to grab a quick taste sample as well, so I can, you know, see how things are coming along :)
Feb 10, 2015  |  By Wes