Grain Filters

Grain filters line or sit on the bottom of a mash tun and allow the wort to drain through while keeping grain particles from making it into the boil.

There are four major types of grain filters.

Variations

Fabric Filter

The bag in “Brew In A Bag”, a fabric filter, is a heat resistant, non-reactive, fabric bag. These allow for single vessel brewing, letting you to buy and clean less equipment. They are usually inexpensive, easy to use, and have a nice tight mesh to keep your wort clear of grain particles.

Stainless Mesh Basket

Used in “Brew In A Basket”, this is exactly what is sounds like. It has the same advantages as the Fabric Filter, except that it is somewhat expensive. Stainless Baskets have the additional advantage of extreme durability.

False Bottom

A false bottom is a plate of stainless steel with small holes in it that sits just off the bottom of a mash tun and connect to a drain valve. These require you to have either a separate mash tun or to drain your kettle/mash tun into a container until the spent grain can be cleaned out. They are easy enough to use, requiring only one extra step to clear the wort before you begin draining it.

Bazooka Screen

Bazooka Screens are stainless mesh tubes that sit on the bottom of the mash tun and connect to the drain valve. These have the same disadvantages as a false bottom with the added disadvantage of not contacting the whole bottom of the grain bed. This can more easily lead to a stuck sparge. Bazooka Screens have the advantage of being very inexpensive.

Variations

Fabric Filter

The bag in “Brew In A Bag”, a fabric filter, is a heat resistant, non-reactive, fabric bag. These allow for single vessel brewing, letting you to buy and clean less equipment. They are usually inexpensive, easy to use, and have a nice tight mesh to keep your wort clear of grain particles.

Stainless Mesh Basket

Used in “Brew In A Basket”, this is exactly what is sounds like. It has the same advantages as the Fabric Filter, except that it is somewhat expensive. Stainless Baskets have the additional advantage of extreme durability.

False Bottom

A false bottom is a plate of stainless steel with small holes in it that sits just off the bottom of a mash tun and connect to a drain valve. These require you to have either a separate mash tun or to drain your kettle/mash tun into a container until the spent grain can be cleaned out. They are easy enough to use, requiring only one extra step to clear the wort before you begin draining it.

Bazooka Screen

Bazooka Screens are stainless mesh tubes that sit on the bottom of the mash tun and connect to the drain valve. These have the same disadvantages as a false bottom with the added disadvantage of not contacting the whole bottom of the grain bed. This can more easily lead to a stuck sparge. Bazooka Screens have the advantage of being very inexpensive.

Our Recommendations

Our Recommendations

The Brew Bag. A high quality and durable fabric filter that has served us here at HBHQ for dozens of brews.

A nice false bottom for 10 gallon drink cooler mash tuns. Don’t forget the adapter tube.

An inexpensive alternative to a false bottom for nearly any mash tun with a drain valve.

Other Options