I currently have 3 kegs and want to make a 2-tier brew station. I have a burner for the boil and was wondering on incorporating a RIMs system. Being a plumber by trade the plumbing of a RIMs is no prob as with the fuel. My question is can I get away with one pump? Do I pipe it with valves to run the recirc of mash and then throw valves to run the sparge out of HLT with same pump? I'd also insulate mash tun, less burner, with RIMs keeping temp. The HLT would have a low BTU burner to maintain temp for brew water. Any insight would help before the build.