Single Kettle BIAB Systems
BIAB (Brew in a Bag) is an extremely cost-effective way of brewing beer while keeping the brewery as simple as possible. These non-circulating systems are characterized by their simplicity and cost efficiency. Simply pour in the desired boil volume, heat to mash temperature with the integrated heating element, turn off the heater, insert the brew bag and stir in the ground brewing malt. Close the lid and wait approx. 60 minutes until the mash is ready (occasional stirring helps). Then pull out the brew bag and turn the element back on to reach boiling temperature. Add your hops according to your recipe, then at the end of the boil insert your preferred cooling method to get to fermentation temperature. Done!
In this article, I'll provide a parts list to get you on your way to brewing with BIAB. Some of the items or quantities will depend on the size of the system, so first some information on brew sizes.
Batch Size
For German brewers, the efficiency of the system, measured as "brewhouse yield" or SHA, is around 52-58%. Malt capacity is limited by your ability to lift the bag out. We recommend using a secure anchor point above the kettle to install a pulley.
| BIAB Kettle Size | Min. batch size* | Max. batch size without sparge ** | Max. batch size with sparge ** | Boil Volume *** |
| 40L | 13 L | 26 L | 31 L | 16 L -34 L |
| 60L | 17 L | 39 L | 49 L | 20,5 L - 53 L |
| 85L | 23 L | 57 L | 72 L | 27 L - 76 L |
| 115L | 28 L | 77 L | 99 L | 32,5 L - 104 L |
* Volume including hot break. The heating element is about 6 cm below the wort level at the end of the brewing process. For very small brews, you should reduce the power of the heating element. This requires a compatible brewing control or a voltage regulator.
** 60 minutes boil time, 13P original gravity, volume including hot break. For stronger beers, the maximum brew size will be reduced. Remember that you will further limit the brew size if you use the condenser in the kettle wall.
*** includes a safety buffer of 6 cm between the wort level and the edge of the kettle. With this volume you have to be very careful to prevent a boil-over. Anti-foaming agents may be required.
Parts List
| Quantity |
Picture |
Product Name |
|---|---|---|
| 1 |  |
Kettle Bottom Drain - 40L, 65L, 85L, oder 115L |
|
40L, 60 L: 1x 85L, 115L: 2x |
 |
|
|
40L, 60 L: 1x 85L, 115L: 2x |
 |
|
| 1 |  |
BIAB Brew Bag |
| 1 |  |
40L, 60L: BIAB Pulley 85L, 115L: BIAB Pulley Medium Strength |
| 1 |  |
BIAB Strap |
| 1 |  |
40L, 60L: Hose Clamp 16-27 mm 85L, 115L: Hose Clamp 25-40 mm |
| 1 |  |
40L, 60L: Silicone Tubing 14 x 24 mm 85L, 115L: Silicone Tubing 19 x 30 mm |
| 1 |  |
40L, 60L: Hose Barb 90 Tri-Clamp 1,5" x 3/4" 85L, 115L: Hose Barb 90 Tri-Clamp 1,5" x 1" |
| 1 |  |
Butterfly Valve Tri-Clamp DN40 |
| 10 |  |
Silicone Gasket Tri-Clamp 1,5" x DN40 |
| 6 |  |
Clamp Tri-Clamp 1,5" |
|
40L, 60 L: 2x 85L, 115L: 1x |
 |
End Cap Tri-Clamp 1,5" |
| 1 |  |
Thermometer, Bimetall Tri-Clamp |