This diagram shows the system during its mashing program where the wort is pumped from the bottom of the mash/lauter tun through the coil in the hot liquor tun then redistributed over the grain bed. My original design called for the use of 2 pumps however in an effort to save some money i will most likely go with a one pump design which should work just as well. The short gray bars indicate temperature probe locations. The small gray cylinders are solenoid ball valves and the black bars are manual ball valves which means my design isn't 100% automatic however the mashing process will be which was my initial goal. This is also a cost saving measure and could be upgraded in the future.