All,

Thanks for the replies.

The copper pipe was part of a water supply loop added to install an "Aquefier" water heater assit unit that uses the heat from the a/c refrigerant line to boost the hot water supply. The "Aquefier" had been disconnected from the a/c line when the condensing unit was replaced at some point but the water loop piping was still in place.

I have seen these units before but I don't know how effective they are. See pics below.

Thanks, Eric

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