If you close the icemaker push/pull knob to stop water flow, you aren't getting antifreeze into that line when you winterize. I leave mine open, and it spits red slush into the ice tray bin. That's the last thing I do, then I turn off pump and I'm done winterizing.
And......time for a confession. I screwed up the valve positions long enough to get antifreeze into the water heater. I'm going to go out this week, drain the water heater again, and try and flush it out.
"Next to prayer, fishing is the most personal relationship of man" Herbert Hoover
"American by Birth, Southern by the Grace of God"Lewis Grizzard
2016 GMC Denali 3500Dually--2017 CC 36CKTS