This technique is to mash about 2.5 kg of grain and add the resulting wort back to a 1.7 kg tinned concentrate. The reason for using a concentrate is to minimise the amount of wort lost to spent hops. A beer kit or concentrate provides base bitterness, while the hops you add are mostly for flavour and aroma. For lightly hopped beers you can use plain malt extract.

The equipment you will need is quite simple:

  • stockpot of about 15 litres,
  • grain bag to fit the pot,
  • thermometer

Very briefly, you heat water in the pot, add the grain bag, mix in the grain and leave it to mash for 45 minutes. Remove the grain bag from the pot, boil the wort, add hops, cool the wort by putting the pot in a sinkful of water, and lastly mix it in a fermenter with a tinned concentrate adding chilled water to bring up the volume to about 20 litres. The kitchen stove or a barbeque should be sufficient to heat the water and boil the wort.

If you have a stockpot already, even if it is a bit smaller, try a brew using it and adding some malt extract if necessary. You will be able to comfortably mash 1 kg of grain for each 5 or 6 litres of pot capacity. Absolute Homebrew sells a 20 litre stockpot with an encapsulated base. and thermometer for $99. K-Mart, Big W and Target sell 16 to 19 litre lightweight stainless stockpost for about $20.

Check the volume of the pot with a ruler and calculator. 

(π r² x h) /1000

The process

  1. A half day or so ahead, chill 4 to 6 litres of water in several plastic bottles.
  2. Add