The Brew Bag - a mash tun filter for Coolers - Round

Regular price $ 30.00

NO MORE STUCK SPARGES!!!  This filter maximizes the flow of wort. Just put The Brew Bag® in your cooler, add grain and strike temp water as usual. When the mash is done follow your normal sparging procedures and then open the spigot and drain into the boil kettle.

Features of The Brew Bag® for Coolers

  • Use again and again - NOT a throw away bag

  • 2" loops for lifting - either by hand or with a pulley and a hook

  • Holds over 100 pounds of grain

  • Smooth seams on the interior enable quick cleaning

  • All strapping intersections are reinforced with "X" stitching

  • 1" poly straps cover seams and bear the strain of grain - this bag will last and last

  • Hand wash and drip dry

 Additional Benefits of The Brew Bag® for Coolers

You can also use the The Brew Bag™ as a complete Brew In A Bag NO SPARGE mash tool. Just calculate the full pre-boil volume, add approximately 12 ounces more water per pound of grain (this will be absorbed and tossed). Then just open the spigot and drain into the boil kettle. You may need a bigger mash tun for this process. 

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Customer Reviews

Based on 174 reviews
Fantastic Bag

This has been an awesome addition to my brewing equipment. As a new brewer, I was barely getting 55% efficiency. This brought me up to 65%, and then allowed me to mill my grains more, bringing me to 72% and climbing. Easy to use, easy to clean, I love it. I’ve even used it over my racking cane as a filter when transferring wort or beer.

My only criticism, which is tiny, is that this is marketed as having the seams on the outside for easier cleaning. This is true of the main seams, but not the top rim of the brew bag. So when I tip out the grains, they still get stuck under the top rim. It’s a very minor point, but would be better to have that seam go to the outside as well to keep everything the same, and for easier cleaning.

Love it works as described.

Only used once, very happy with the results, quality made. No complaints, should last a long life. Probably going to get me a spare for safe keeping. Great product.

Works great

This bag is constructed better than previous bags I have owned. Virtually no grain trub.

Great product

These custom bags are perfect.


This bag works exactly as advertised. I made a beer that's was 66% rye and wheat with 2lbs of rice hulls without this bag and the mash would not run out no matter what i did. I made the same beer with 1lbs of rice hulls using this bag and the mash ran out without any problems. There was no reduction in the flow of the wort and no reduction in extraction or mash efficiency. I can now mash any grain bill without worry. I don't know why I didn't start using this sooner.