Since I'm putting in all new plumbing along with a water heater and softener, I decided I might as well put in a circulation pump so that I can have hot water instantly. My question is what is the best way to plumb this. Do I just run a third line along with my hot and cold feeds to act as the return side of the circuit? I assume I will need a check valve in there somewhere. Are there some diagrams around somewhere?
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