Double Boiler

From Distillers Wiki

A double-boiler is a stovetop apparatus used for any occasion when more indirect heating is desired.

It consists of a saucepot of boiling water, on top of which a second pot fits, so that the latter is heated by steam.

If one does not own such a device, the same cooking technique can be achieved by placing a metal bowl or glass bottle in a larger pot of boiling water.

Double boilers are useful when if you are distilling a wash with all grains in.