Originally Posted by Kerberbb
Okay, buy why? Because you want the heat to be even? Please explain, can it be done however?
The problem is that there is no way to stir the wort that lies below the false bottom and there is a high probability that this will lead to scorching the wort. Additionally, it will be near impossible to heat the grain bed uniformly by stirring alone. You only need to attempt this once in order to understand. You can, however, do a manual circulation while heating the MT directly. This would be draining wort into a large measuring cup or something similar and returning it to the top of the MT. This can be a lot of work and requires constant attention throughout the mash duration. While you are doing that, visions of pumps will be dancing through your head. I guarantee it!