Winterizing. Just looking for some clarifications...

Run the pump to get the majority of the water out and it shouldn't be a problem. On a recent trip to Canada, we drained the hot and fresh tank, opened the low points, ran the pump, and put antifreeze in the rest of the lines. That's how it sat unused in 12F for 3 weeks. I'm sure there was some water still trapped in the tank and in the line to the pump.