When I had my new Apollo SA 3024 airhandler installed in the attic I also replaced my plastic hot water supply lines that ran under the house with 3/4 insulated refrigeration copper lines that run thru the garage ceiling and into the attic to the air handler.
Was this a smart thing to do??
Now that the lines are above the hot water heater should I close the ball valves at the hot water heater to prevent hot water movement thru the coil during AC operation?
Do I need to worry about water stagnating if I close the valves?