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It is a 60 gallon electric, Super Cascade, Giant Greenfoam, hot water tank. It looks one can connect the cold water either on the top or on the side at the bottom of the tank. I don't know why it was connected to the bottom of the tank. There is also what looks like a threaded drain valve at the bottom of the tank, but I don't see how one would open it. The copper is attached to the tank with a metal elbow. It might be hardened bronze (darker than copper, rough surface, not shiny), but I don't know enough to be able to tell. In any case, it is not anywhere near 6" long. I tried twice to upload a digital picture of the installed tank, but it timed out on the last 5 kb (I'm on dial-up).
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