I'm a GC trying to help my plumber with a question, so I apologize in advance if I don't fully understand your answer. He says he's never done this before, and we're can't find anyone local who knows the answer. Customer wants recirculating hot water loop. No problem. Also, we're installing Geo thermal, which provides a loop option into hot water tank. Great. But, can we do both? (if so, a drawing would be AWESOME!) Thanks!