Below is a plan of a brew rig I am planning on doing this winter, I will am trying to get it done with just one pump and a lot of valves. Let me know if looks okay (that is if you can read it and understand it). Any input would be much appreciated. Also, do you usually have a burner below your MLT? If so, will that scorch the grains on the bottom and only heat up the bottom portion of the mash? I plan on doing a recirculation on the mash periodically thoughout it.