Alright, I managed to get a few pics last night. Here is a view of the outside where the hose attaches:
This is the plug I serviced:
Here you can see the tap for the cold side of the kitchen sink above:
This is the bypass loop for the hot water heater:
Right now, the bottom valve is open and the top valve is closed. In the winter, those positions are reversed. Not sure why I am getting the hot to back up into the cold line between the inlet to the hot water heater and the faucet in the kitchen sink. I'm assuming that one white things on the hot water tank is a check valve that would keep the antifreeze out. Not sure if this is an actual problem???